Sources & Bibliography

What it isA 2014 experimental study finding that a brief cognitive intervention emphasizing compassionate (rather than competitive) goals reduced hormonal stress reactivity to a standardized social-evaluative stress test.

Where it fitsDirectly supports the book's Chapter 3 argument that a brief cognitive/mindset shift can alter the body's neuroendocrine stress response, i.e., the 'Biological Pivot,' and its clinical-referral material in the Interlude/Appendix B.

What it isA social psychology study finding that wearing a lab coat described as a doctor's coat improved sustained attention, showing clothing's symbolic meaning and physical experience jointly shape cognition.

Where it fitsIllustrates how the 'story' attached to physical objects/actions can shift mental state and performance, supporting the book's Chapter 2 four-dimension whole-person model linking physical and psychological states.

Replication caveatEnclothed cognition rests on shaky ground, though the detail matters. Burns and colleagues (2019) ran a preregistered direct replication at roughly three times the original sample and found no effect — but they replicated the Stroop selective-attention experiment, whereas the sustained-attention result described above comes from the paper's later experiments, which nobody has directly replicated. So the closest thing to a test of this literature failed, and the specific finding cited here is unreplicated rather than disconfirmed. Adam and Galinsky published a reply accepting the replication as competently conducted. Read it as an idea worth thinking with, not an established result.

What it isA comprehensive reference edited by Robert Ader summarizing research on how behavior, the nervous system, and the immune system interact.

Where it fitsProvides the foundational psychoneuroimmunology science behind PRE►LOΔD's mind-body stress chapters showing how psychological states affect physical health.

What it isA foundational behavioral-economics paper arguing that impulsiveness arises from hyperbolic discounting of delayed rewards.

Where it fitsBackground reading on self-control and delay discounting, relevant to the book's themes of agency and habit formation over impulsive reward-seeking.

What it isA bestselling memoir recounting the author's weekly visits with his dying former professor, capturing lessons on life, death, and meaning.

Where it fitsBackground reading on mortality, meaning, and letting go, resonant with the book's themes of agency and acceptance in Chapter 11.

Source caveatThe linked publisher page covers every format of the book. The 1997 Doubleday hardcover cited here is listed there alongside the current Crown trade paperback, which carries 25th-anniversary branding but shares the 2002 paperback ISBN and on-sale date rather than being a separately dated new edition.

What it isBuzz Aldrin's 1973 memoir, written shortly after Apollo 11, candidly describing his depression and personal turmoil following the moon landing.

Where it fitsComplements the book's space-mission narrative framing (tied to the title PRE►LOΔD and the Mars Climate Orbiter motif) and its theme that external success doesn't guarantee inner peace.

What it isBuzz Aldrin's 2009 memoir recounting his struggles with depression, alcoholism, and loss of purpose after Apollo 11, and his path back to a meaningful life.

Where it fitsAn astronaut memoir reinforcing the book's Mars/space-mission framing device, illustrating that even history's greatest achievers face post-triumph emptiness (echoing Chapter 4's 'Why Winning Still Feels Empty').

What it isAn experimental economics paper showing that arbitrary initial anchors can durably shape people's valuations, producing stable but arbitrary demand curves.

Where it fitsRelates to Chapter 4's Gap/Gain and decision-making themes, showing how arbitrary reference points distort perceived value and satisfaction.

What it isA popular-science book by behavioral economist Dan Ariely exploring how irrational forces like emotion and social norms unexpectedly benefit decision-making at work and home.

Where it fitsSupports the Gap/Gain and decision-making themes of Chapter 4, showing how irrational psychological forces shape satisfaction and choice.

What it isA neuroscience review explaining how chronic and acute stress impair prefrontal cortex structure and function via specific molecular signaling pathways.

Where it fitsDirectly supports Chapter 3's Biological Pivot argument that stress physiologically reshapes brain function, underscoring the need for stress-mindset reappraisal.

What it isW. Ross Ashby's foundational 1956 textbook laying out the basic principles of cybernetics, including feedback, control, and self-regulating systems.

Where it fitsCited in Chapter 3 to ground the prediction-engine/feedback-loop model of the brain's stress-response architecture in classic systems/cybernetic theory.

Source caveatThe citation names the London imprint (Chapman & Hall); the linked scan is the New York (J. Wiley) printing of the same 1956 edition. Both are legitimate 1956 imprints of the same book.

What it isA foundational cybernetics paper establishing the 'law of requisite variety,' which states a regulating system must have as much variety as the system it controls.

Where it fitsUnderpins Chapter 3 and 'What This Book Claims — and What It Does Not' section's systems-thinking framing of the brain as a control/prediction system needing sufficient behavioral variety to manage complexity.

Source caveatCybernetica has ceased publication and the paper has no DOI and no publisher archive. The link is the Principia Cybernetica Project's full-text republication, which carries the original source line and pagination — 1(2), 83–99.

What it isAn educational psychology study distinguishing the 'Golem effect' (negative expectations harming performance) from the 'Pygmalion/Galatea effect' (positive expectations helping performance) among biased and unbiased teachers.

Where it fitsFurther-reading background on how expectations (including unspoken ones) shape outcomes in relationships, tying to Chapter 8 and Chapter 10's expectation-driven dynamics.

What it isA Stanford/Huberman Lab randomized study finding that brief daily structured breathing exercises (especially 'cyclic sighing') improve mood and reduce physiological arousal more than mindfulness meditation.

Where it fitsSupports Chapter 3's Biological Pivot and Appendix A toolkit material on breathwork/HRV-based techniques for regulating physiological stress.

What it isA comprehensive clinical textbook by David Barlow covering the nature, causes, assessment, and treatment of anxiety and panic disorders.

Where it fitsFurther-reading background supporting the book's clinical grounding on anxiety, relevant to Chapter 3's stress-mindset and trauma-informed referral material.

Scope caveatThe second edition is still the current one — Guilford lists only a 1988 first edition before it. But it is organised around the DSM-IV anxiety disorders and predates DSM-5 (2013), which moved OCD and PTSD out of that category. The clinical material stands; the diagnostic taxonomy is a generation old.

What it isLisa Feldman Barrett's 2017 book arguing emotions are actively constructed by the brain (via prediction and interoception) rather than being hardwired, universal reactions.

Where it fitsCentral theoretical support for Chapter 6's 'Your Feelings Are Data' framework and the book's broader brain-as-prediction-engine model.

What it isA landmark 1997 Iowa Gambling Task study showing people develop unconscious physiological biases guiding advantageous decisions before consciously knowing the winning strategy.

Where it fitsSupports the book's discussion of nonconscious, body-based signals feeding into decision-making, relevant to the prediction-engine and emotional-labeling (Chapter 6) chapters.

What it isA theoretical review proposing 'social baseline theory,' which holds that proximity to trusted others reduces the brain's perceived effort and threat, conserving neural and physiological resources.

Where it fitsSupports Appendix A toolkit material on relationships and co-regulation as a biological resource for managing stress and arousal.

What it isA controlled study (N=90) finding that psychology students who received a mindfulness- and compassion-based intervention showed higher basal salivary oxytocin and greater empathy than controls.

Where it fitsProvides biological support for the book's compassion/self-compassion and social-bonding material, tying contemplative practice to the oxytocin system underlying the relationship and service chapters.

What it isAn empirical economics study using sales-worker data providing large-scale evidence for the 'Peter Principle'—that firms promote based on current performance even when it doesn't predict managerial success.

Where it fitsFurther-reading background on flawed incentive/expectation systems in organizations, tangential to the book's themes on unspoken expectations and performance pressure.

What it isA 2003 review proposing that 'reward' should be separated into distinct components: learning, affect/liking, and motivational 'wanting.'

Where it fitsUnderpins the neuroscience of reward and dopamine relevant to the book's habit-formation material and the Gap-vs-Gain (Chapter 4) distinction between wanting and true satisfaction.

What it isA 2013 study finding that practicing the relaxation response produces measurable gene-expression changes in pathways related to energy metabolism, insulin secretion, and inflammation.

Where it fitsProvides biological evidence that relaxation practice reshapes physiology at the level of gene expression, supporting Chapter 3's stress-mindset and mind-body material. Note that what this study measured was the leukocyte transcriptome, not heart-rate variability.

Source caveatA published correction to this paper exists: PLOS ONE, 12(2), e0172873 (2017).

What it isA clinical study finding that worry in generalized anxiety disorder consists predominantly of verbal thought rather than mental imagery.

Where it fitsSupports Chapter 3's treatment of anxiety and worry as a cognitive/narrative process that can be identified and reshaped through reappraisal.

What it isA Cochrane systematic review of 14 trials (805 participants) concluding that music listening may reduce anxiety in mechanically ventilated ICU patients, and that it consistently reduced respiratory rate and systolic blood pressure. There was no strong evidence for diastolic pressure, results for heart rate were inconsistent, and most included trials were judged at high risk of bias for lack of blinding.

Where it fitsSupports Appendix A's toolkit material on how simple sensory interventions can regulate physiological arousal. The evidence base is critical-care patients, so it points to a direction rather than to an effect a healthy reader should expect to reproduce.

What it isA set of experiments showing self-compassion (rather than self-criticism) increases motivation to improve after failures or moral mistakes.

Where it fitsFurther-reading background supporting Chapter 11's Sphere of Agency / letting-go-without-giving-up themes, showing self-compassion fuels growth rather than complacency.

What it isA study finding that people higher in trait self-compassion show a smaller inflammatory (interleukin-6) response to acute psychosocial stress.

Where it fitsDirectly supports Chapter 11's Letting Go Without Giving Up, linking self-compassion to reduced physiological stress reactivity.

What it isAn experimental study finding that reappraising pre-performance anxiety as excitement (rather than trying to calm down) improves performance.

Where it fitsCentral evidence for Chapter 3's stress-reappraisal/Biological Pivot argument that reframing arousal narratives changes outcomes.

What it isA book by Arthur C. Brooks on finding renewed meaning and purpose in the second half of life by shifting from 'fluid' to 'crystallized' strengths.

Where it fitsSupports Chapter 3's themes on reframing decline/aging narratives as part of a healthy stress/meaning mindset shift.

What it isA 2007 academic book presenting a model of 'savoring' — the capacity to notice and amplify positive experience — along with measurement tools for studying it.

Where it fitsDirectly supports Chapter 5's discussion of training the brain toward savoring and gratitude aptitude.

What it isA classic study demonstrating the 'planning fallacy'—people systematically underestimate how long tasks will take even when aware of past experience.

Where it fitsFurther-reading background on cognitive biases relevant to the book's prediction-engine-brain framework and realistic goal-setting.

What it isDavid Burns's bestselling 1980 popularization of cognitive behavioral therapy, teaching readers to identify and correct distorted thought patterns to improve mood.

Where it fitsSupports Chapter 6's 'Your Feelings Are Data'/Emotional Ledger discussion of cognitive distortions and reframing negative thought patterns.

Source caveatFirst published in 1980 by William Morrow. The revised and updated edition cited here is the one HarperCollins still keeps in print.

What it isA 2013 theoretical paper proposing that close relationship partners form a bidirectional emotional system that helps regulate each other's arousal and maintain emotional stability.

Where it fitsSupports the book's co-regulation themes (Chapter 10, 'How You Are Already Shaping Everyone Around You') on how people emotionally influence and stabilize one another in relationships.

What it isA theoretical neuroscience paper proposing the REBUS model, arguing psychedelics work by relaxing the brain's high-level predictive beliefs, increasing bottom-up information flow.

Where it fitsSupports the Interlude/Appendix B clinical-referral material on the predictive-brain model and its relevance to trauma-related clinical treatments.

What it isA review of neuroendocrine systems—especially oxytocin and vasopressin—underlying social attachment, pair bonding, and love.

Where it fitsSupports Chapter 8's exploration of the biological basis of relational bonding and unspoken relational expectations.

Scope caveatThe pair-bonding evidence in this review comes largely from animal models — prairie voles above all. It maps the neuroendocrine systems involved; it is not human evidence about relationships.

What it isA review arguing that oxytocin-related neuropeptide pathways were central to the evolution of human sociality, caregiving, and stress regulation.

Where it fitsFurther supports Chapter 8's biological grounding of relationship bonds and how they moderate stress physiology.

What it isA televised 60 Minutes interview in which Steve Kroft profiled a 27-year-old Tom Brady, who said of his three Super Bowl rings, "I think, God, it's got to be more than this," and "I mean this can't be what it's all cracked up to be."

Where it fitsLikely used as a real-world anecdote illustrating the emptiness of achievement without meaning, resonating with Chapter 4's 'Why Winning Still Feels Empty' (Gap vs. Gain) theme.

Source caveatThe linked page is CBS's February 2021 retrospective, "Super Bowl 2021: Looking back at Tom Brady in 2005," which reproduces the 2005 interview rather than being the original broadcast.

What it isA large online experiment showing health behaviors spread faster through clustered social networks with redundant ties than through random long-range networks.

Where it fitsFurther-reading background on social contagion of norms/behaviors, relevant to Chapter 7's discussion of how habits and norms spread socially.

What it isA landmark psychology study showing that people unconsciously mimic the postures, gestures, and mannerisms of those they interact with, and that this mimicry increases liking and smooths social interaction.

Where it fitsBackground reading on nonconscious social mimicry that supports the book's discussion of social contagion and how environment/relationships shape behavior (Chapters 7 and 10).

What it isA prospective 18F-FDG PET/CT study in which 23 obese women were scanned before and after three months of supervised exercise, five sessions a week. Stress-associated amygdala metabolic activity fell across the programme, alongside reductions in adiposity and inflammatory markers. A separate group of 20 age-matched non-obese women, scanned once, supplied the cross-sectional comparison.

Where it fitsSupports the Physical dimension / 'Biological Pivot' by putting a measurable brain-level correlate on sustained exercise. It makes the mechanism concrete; it does not establish the size of the effect for readers generally.

Design caveatThe exercise arm was a pre/post design with no non-exercising control group, so the fall in amygdala activity cannot be separated from the passage of time, repeat scanning, or the other changes that accompany a supervised programme. The non-obese group was a matched cross-sectional comparison, not a randomised control. The participants were 23 obese women recruited in a clinical setting.

What it isA 20-year longitudinal analysis of the Framingham Heart Study network finding that happiness clusters: people surrounded by happy people are more likely to be happy themselves, and the association is detectable out to three degrees of separation.

Where it fitsConsistent with Chapter 7's 'Geography Audit' argument that the people around you quietly reset emotional and behavioural standards. It establishes the pattern, not the mechanism.

Design caveatWhether the clustering reflects contagion or shared circumstances and homophily is among the most contested questions in network science, precisely because an observational cohort cannot separate them (Lyons, 2011; Shalizi & Thomas, 2011).

What it isRobert Cialdini's classic account of why people say yes. The new and expanded edition sets out seven principles — reciprocation, commitment and consistency, social proof, liking, authority, scarcity, and unity, the last added in this revision — with new research and a section on defending yourself against unethical influence attempts.

Where it fitsFurther-reading background on social influence and norms, relevant to the book's themes on social contagion and unspoken relational/social expectations.

What it isA landmark philosophy paper arguing that cognitive processes can extend beyond the brain into tools and the environment, forming a coupled mind-world system.

Where it fitsSupports Appendix A's toolkit framing of external tools/environment as legitimate extensions of cognitive and self-regulatory processes.

What it isA small cross-sectional genomics study: leukocyte gene expression in 14 older adults — 6 who had reported chronic social isolation across four years, against 8 consistently socially integrated peers. 209 genes were expressed differently between the groups, with immune-activation and pro-inflammatory genes higher and genes supporting mature B lymphocyte function and the type I interferon response lower.

Where it fitsReinforces the book's stress-biology (Chapter 3) and social-environment (Chapter 7) themes by showing that social experience tracks with immune gene expression. Isolation was measured, not manipulated, and at N = 14, so this documents an association rather than a causal pathway.

What it isA large meta-analysis of 138 studies finding that manipulating facial expressions (e.g., holding a pen in the teeth to force a smile) produces only small, inconsistent effects on subjective emotional experience.

Where it fitsSupports Chapter 6's discussion of the Emotional Ledger and affect labeling by showing that facial-feedback effects on felt emotion are weaker than popular self-help claims suggest.

What it isA bestselling business book presenting five years of research on why a small set of companies achieved and sustained exceptional long-term performance.

Where it fitsIts concepts of disciplined habits, humble ('Level 5') leadership, and sustained excellence parallel the book's habit-formation and agency themes (Chapters 4 and 11).

What it isA cybernetics paper proving that any system able to successfully regulate another complex system must, in effect, contain an internal model of that system.

Where it fitsBackground reading underpinning the book's prediction-engine framework, since the brain-as-internal-model idea is central to the PRE►LOΔD concept.

What it isA review, drawing mainly on rodent studies, arguing that exercise raises brain-derived neurotrophic factor (BDNF), stimulates hippocampal neurogenesis, and improves learning, memory, and resistance to brain injury.

Where it fitsSupports the book's discussion of exercise as a lever for brain health, aligning with its HRV/sleep/exercise chapters on biological foundations of resilience; also referenced near Chapter 5/Part Five habit-formation material and the book's epistemology discussion of what the exercise-brain evidence does and doesn't show.

Scope caveatHuman evidence that exercise increases hippocampal volume and improves memory came later — see Erickson et al. (2011), cited separately in this bibliography.

What it isStephen Covey's bestselling self-help book outlining seven habits, from proactivity to 'sharpening the saw,' for personal and interpersonal effectiveness.

Where it fitsBackground reading related to the book's habit-formation and daily-practice themes in Chapter 5 / the 90-Day Program.

Source caveatFirst published in 1989 by Free Press. The 30th anniversary edition adds new material from Sean Covey and a foreword by Jim Collins; the seven habits themselves are Covey's.

What it isA neuroscience review proposing that the anterior insular cortex integrates bodily signals into subjective feelings, underpinning interoceptive awareness and emotional experience.

Where it fitsGrounds Chapter 6's 'Your Feelings Are Data' (Emotional Ledger, affect labeling) in the neuroscience of interoception and bodily awareness.

What it isAn experiment showing that labeling an identical milkshake as 'indulgent' versus 'sensible' produced markedly different ghrelin (hunger hormone) responses, demonstrating that mindset shapes physiology.

Where it fitsDirectly supports Chapter 3's 'Your Body Is Taking Orders From a Story,' showing how belief/mindset produces measurable biological (hormonal) effects.

What it isA study introducing the Stress Mindset Measure and showing that viewing stress as enhancing (rather than debilitating) leads to more adaptive physiological and behavioral stress responses.

Where it fitsCentral evidence for Chapter 3's argument on stress mindset and reappraisal as a 'Biological Pivot' that changes the body's stress response.

What it isA meta-analysis of 38 studies (4,356 patients) finding interpersonal psychotherapy is an effective treatment for depression, comparable to other psychotherapies. Pharmacotherapy was modestly more effective than IPT alone, and combined maintenance treatment was best at preventing relapse.

Where it fitsBackground reading on depression treatment relevant to the book's clinical-referral material in the Interlude and Appendix B.

What it isA behavioral study finding that temporal landmarks (New Year, birthdays, Mondays) boost motivation for goal pursuit by creating a psychological 'fresh start' that separates past failures from a new mental accounting period.

Where it fitsReal, relevant work on motivation and habit initiation; likely informs the book's habit-formation guidance, such as timing behavior-change efforts (e.g., the 90-Day Program) around fresh-start moments.

What it isA foundational neuroscience book arguing that emotion and bodily feeling are integral to rational decision-making, challenging the Cartesian separation of mind and body.

Where it fitsProvides the core neuroscientific grounding for the book's claim that emotions are integral data rather than noise, underpinning Chapter 6's 'Your Feelings Are Data.'

What it isAntonio Damasio's book arguing that consciousness and the sense of self arise from the brain's continuous mapping of body states and emotions.

Where it fitsSupports Chapter 6's 'Your Feelings Are Data' argument that emotions are bodily signals carrying information, not noise to suppress.

What it isDeb Dana's clinical guide translating Stephen Porges's polyvagal theory into practical tools therapists use to help clients regulate their nervous systems.

Where it fitsBackground reading on nervous-system regulation relevant to the book's HRV, stress, and co-regulation themes.

What it isA Johns Hopkins randomized clinical trial finding that psilocybin-assisted therapy produced large, rapid reductions in depression symptoms.

Where it fitsCited in the clinical-referral material, now the Interlude 'When PRE►LOΔD Isn't Enough' and Appendix B, on treatments beyond the book's own scope for major depression.

What it isAn experimental study finding that the hormone oxytocin increases in-group trust and cooperation while also heightening defensive aggression toward out-groups.

Where it fitsSupports the in-group/out-group half of Chapter 10 — that the same neurochemistry which raises trust toward one's own group can raise defensiveness toward outsiders. It is not evidence for co-regulation between people; that part of the chapter rests on other sources.

Scope caveatA double-blind drug-administration study: healthy male participants received intranasal oxytocin or placebo, then played economic games with in-group and out-group targets.

What it isA systematic review and meta-analysis of RCTs concluding that physical activity lowers cortisol and improves sleep outcomes in adults.

Where it fitsBacks the exercise-biology material on cortisol regulation, positioning physical activity as a lever for stress preparation and recovery.

What it isA Harvard Business School study (with field and lab experiments) finding that deliberately reflecting on one's work/experience significantly improves subsequent performance and learning.

Where it fitsSupports the framing of 'Some People Walk Into Every Room Already Winning' and the book's reflective practice material, reinforcing the value of structured reflection (e.g., journaling) in the book's practice program.

What it isA randomized trial finding behavioral activation therapy performed as well as antidepressant medication, and better than cognitive therapy, for severely depressed adults.

Where it fitsCited in Chapter 12 (The Daily Pattern) and 90-Day Program material, on habit and behavioral-activation themes.

What it isA 2014 experimental study finding that college students who were told (regardless of the truth) that they'd spent an above-average share of the night in REM sleep performed significantly better on a cognitive test the next day than students told they'd slept poorly — a genuine 'placebo sleep' effect independent of actual sleep quality.

Where it fitsReinforces the book's core claim that belief and expectation shape cognitive performance as much as the underlying biological state — the sleep-specific counterpart to Crum's milkshake and stress-mindset studies (050, 051), which supply the hormonal evidence. This study measured cognition only; no physiological measure was taken.

What it isA review explaining how chronic stress and depression reduce synaptic connections in mood-regulating brain regions, and how new treatments aim to restore them.

Where it fitsCited in the clinical-referral material (Interlude/Appendix B) on the neuroscience underlying more severe depression requiring professional care.

What it isA Royal Society study finding that episodes of shared, relaxed laughter raise pain thresholds — an indirect marker the authors interpret as endorphin release. No opioid or endorphin level was measured; the bonding account rests on the pain-threshold proxy.

Where it fitsCited in Chapter 2 (The Whole Person Architecture), illustrating how social/physical connection is biologically wired into the whole-person model.

What it isAndrew Elliot's paper describing a hierarchical model in which approach and avoidance motivations organize goals, temperament, and emotion.

Where it fitsBackground reading relevant to the Gap-vs-Gain and approach/avoidance framing in Chapter 4.

What it isA landmark experimental study showing that regularly counting one's blessings (versus burdens or neutral events) measurably increases well-being and positive affect.

Where it fitsCited in Chapter 5 (Train Your Brain to Find What It's Looking For), providing the foundational evidence for gratitude practice as a trainable savoring aptitude.

What it isRobert Enright's step-by-step self-help book, published by the American Psychological Association, guiding readers through a four-stage process of forgiveness.

Where it fitsCited in Chapter 10 in connection with letting go of resentment and reshaping relational dynamics with others.

What it isA PNAS study linking chronic psychological stress in women to shorter telomeres and lower telomerase activity, markers of accelerated cellular aging.

Where it fitsNo chapter tag given, but this foundational biological-stress citation fits Chapter 3's Biological Pivot as the best-known evidence associating chronic psychological stress with markers of cellular aging. It establishes the association, not that stress caused the shortening.

Design caveatCross-sectional comparison in a small, all-female sample — caregiving mothers of chronically ill children versus controls. The title says in response to, but the design cannot establish that direction, and this is one of the most contested findings in stress biology.

What it isA PNAS randomized trial showing that one year of aerobic exercise training increased hippocampal volume and improved spatial memory in older adults, reversing typical age-related shrinkage.

Where it fitsNo chapter tag given; aligns with the book's HRV/sleep/exercise material showing exercise's direct neurological benefits relevant to the Biological Pivot and habit chapters.

What it isA General Conference address by LDS leader Henry B. Eyring urging steady, consistent daily spiritual practice rather than last-minute preparation.

Where it fitsCited in the faith/spiritual material, now Chapter 2's spiritual framing or Appendix C, reflecting the book's LDS-informed spiritual preparation theme.

What it isA randomized clinical trial finding that a single intravenous ketamine infusion rapidly and significantly reduced chronic PTSD symptoms compared to an active placebo.

Where it fitsCited in the clinical-referral material (Interlude/Appendix B) on emerging treatments for trauma beyond the book's self-help scope.

What it isA review that pools six MAPS-sponsored Phase 2 trials of MDMA-assisted psychotherapy and compares them indirectly against paroxetine and sertraline data extracted from FDA regulatory filings. It reports larger effect sizes for MDMA-assisted psychotherapy. Nobody was randomised between MDMA and an SSRI, and the arms are not comparable: MDMA participants received roughly 30 hours of psychotherapy, while the SSRI pivotal trials used placebo with no therapy at all.

Where it fitsCited in the clinical-referral material (Interlude/Appendix B) on advanced trauma treatments requiring professional oversight.

Source caveatMAPS supplied the MDMA and fully funded this analysis, and every author received salary support from MAPS or MAPS PBC.

What it isA therapist's manual detailing prolonged exposure therapy, a leading evidence-based treatment protocol for PTSD.

Where it fitsCited in the clinical-referral material (Interlude/Appendix B) as a resource for trauma treatment beyond the book's own scope.

What it isAn edited volume of official practice guidelines from the International Society for Traumatic Stress Studies summarizing evidence-based PTSD treatments.

Where it fitsCited in the clinical-referral material (Interlude/Appendix B) as an authoritative reference for trauma treatment options.

What it isA 20-year analysis of the Framingham Heart Study network finding that happiness spreads between people up to three degrees of social separation.

Where it fitsSupports Chapter 7's Geography Audit and social-contagion argument as the best-known evidence that happiness clusters through social networks over time — cited for the pattern, not as proof of person-to-person transmission.

Design caveatObservational. The contagion reading is contested: homophily (people befriending similar people) and shared environment produce the same clustering, and network analyses of the Framingham cohort cannot separate the two.

What it isViktor Frankl's memoir of surviving Nazi concentration camps paired with his theory of logotherapy, arguing that finding meaning is the primary human drive even amid extreme suffering.

Where it fitsCited in Chapter 3, supporting both the stress-reframing/Biological Pivot theme and the meaning-making and agency themes now central to Chapter 11 (Letting Go Without Giving Up / Sphere of Agency).

What it isA classic study showing people judge past experiences mainly by their peak and ending intensity, largely ignoring how long the experience lasted (duration neglect).

Where it fitsCited across Chapters 5, 10, and 12 to explain how memory and evaluation of experiences, savoring, relationships, and habits are shaped by peaks and endings rather than total duration.

What it isBarbara Fredrickson's foundational paper proposing the broaden-and-build theory: positive emotions widen thinking and build lasting personal resources.

Where it fitsSupports Chapter 5's material on training the brain toward savoring and gratitude as mechanisms that build resilience over time.

What it isA narrative-therapy guidebook showing clinicians how to use playful, externalizing techniques to help children and families address serious problems.

Where it fitsBackground reading related to the book's approach to reframing problems and separating identity from struggle, akin to narrative reappraisal techniques used in Chapter 6.

What it isKarl Friston's influential theoretical paper proposing that the brain minimizes 'free energy' (prediction error) as a unifying principle for perception, action, and learning.

Where it fitsCited in Chapters 3 and 6, providing the core neuroscientific basis for the book's brain-as-prediction-engine framework and its link to stress reappraisal and emotional labeling.

What it isKarl Friston's paper argues that self-organizing life is a statistically inevitable outcome of any random dynamical system with a Markov blanket, and that living systems act to minimize "free energy" (surprise) about their environment.

Where it fitsUnderpins the book's Chapter 5 framing of the brain as a prediction/free-energy-minimizing system that learns to find what it expects.

What it isThis paper reviews behavioral-economics evidence and argues that the claim "losses loom larger than gains" is not well supported, challenging the standard loss-aversion narrative.

Where it fitsUsed in 'What This Book Claims — and What It Does Not' to illustrate how even famous psychological effects can be overturned or nuanced by later replication and re-analysis, modeling the book's evidence-qualified claims.

What it isFormer Google X executive Mo Gawdat's book applying an engineering mindset to derive a formula for happiness, informed by personal tragedy and neuroscience/positive psychology research.

Where it fitsNo chapter tag given; its 'engineered' approach to happiness and gratitude aligns with Chapter 5's savoring/gratitude aptitude theme.

What it isAn updated meta-analysis finding that competition winners show elevated testosterone relative to losers, an effect most robust outside the laboratory.

Where it fitsInforms the Physical/hormonal readiness material on how competitive outcomes shape testosterone and states of readiness.

What it isThis 2025 meta-analysis re-examines the classic Zeigarnik effect (better memory for interrupted tasks) and the related Ovsiankina effect (tendency to resume interrupted tasks), finding no consistent memory advantage but a general tendency to resume unfinished tasks.

Where it fitsIncluded as a corrective. This meta-analysis finds the classic Zeigarnik memory effect does not reliably replicate, while the tendency to resume interrupted tasks does. Cited to keep the follow-through material in Chapter 5 and the 90-Day Program resting on resumption rather than on the popular 'unfinished tasks nag at you' reading of Zeigarnik.

What it isAn uncontrolled pilot study in which six patients at a cognitive-behavioural day centre for chronic difficulties completed twelve two-hour sessions of compassionate mind training, reporting reductions in depression, anxiety, shame and self-criticism.

Where it fitsCited in Chapter 3 (the Biological Pivot, stress mindset) to support compassion-based techniques for regulating self-critical stress responses.

Design caveatNo control group and N = 6 — suggestive, not confirmatory. The sample is a chronic clinical population rather than general readers.

What it isPaul Gilbert's article introduces Compassion-Focused Therapy (CFT), an approach for people with high shame and self-criticism that draws on evolutionary and developmental psychology to cultivate self-soothing and self-compassion.

Where it fitsCited in Chapter 11 ('Letting Go Without Giving Up') to support compassion-based approaches to self-regulation and agency.

What it isThis book by Paul Gilbert lays out key theoretical and practical points distinguishing Compassion-Focused Therapy from other CBT approaches.

Where it fitsCited in the trauma/clinical-referral material, now in the Interlude 'When PRE►LOΔD Isn't Enough' / Appendix B, as a resource on compassion-based clinical treatment.

What it isThis classic study demonstrates the "spotlight effect," showing people consistently overestimate how much others notice and remember their appearance and actions.

Where it fitsBackground/further-reading source relevant to the book's themes of social self-consciousness and environment/social contagion (Chapter 7).

What it isDaniel Goleman's bestselling book arguing that emotional self-awareness, regulation, and empathy ('emotional intelligence') matter as much as or more than cognitive IQ for life success.

Where it fitsCited in Chapter 6 (Your Feelings Are Data), grounding the book's Emotional Ledger and affect-labeling concepts in the popularized science of emotional intelligence.

What it isPeter Gollwitzer's influential paper shows that forming specific "if-then" implementation intentions, linking situational cues to goal-directed actions, substantially improves follow-through on goals compared to simply intending to act.

Where it fitsCited in the implementation/habit-formation material (Part Five and Appendix A) as the foundational research behind the book's if-then planning tools for building habits in the 90-Day Program.

What it isA meta-analysis of 94 studies showing that forming specific 'if-then' implementation intentions substantially improves goal follow-through compared to goal intentions alone.

Where it fitsCited in Appendix A (The Toolkit at a Glance), supplying the evidence base for concrete implementation-intention exercises among the book's practical tools.

What it isThis meta-analytic study examines competing theoretical explanations for why leadership behaviors, such as consideration and transformational leadership, improve follower task performance and organizational citizenship behavior.

Where it fitsBackground/further-reading source relevant to the book's discussion of co-regulation and how leaders and relationships shape others' standards and performance (Chapter 10).

What it isThis review explains how the brain synthesizes olfactory input into unified "odour objects" via the piriform cortex, enabling smell identification and discrimination.

Where it fitsCited in Appendix A ('The Toolkit at a Glance') as neuroscience background for a sensory grounding/olfactory tool in the book's toolkit.

What it isJohn Gottman and Nan Silver's research-based guide distilling decades of marital observation into seven principles for building lasting, happy marriages and identifying relationship-ending behaviors like the 'Four Horsemen.'

Where it fitsNo chapter tag given; directly relevant to the relational-contract and relationship chapters (8-10) on expectations, communication, and repairing marital dynamics.

What it isJohn Gottman and Joan DeClaire's book presenting a five-step method, centered on recognizing and responding to emotional 'bids' for connection, to strengthen relationships.

Where it fitsCited in Chapters 10 and 11, supporting the co-regulation/Pygmalion-effect theme ('How You Are Already Shaping Everyone Around You') and the Sphere of Agency discussion of relationships.

What it isDavid Grand's book introduces Brainspotting, a therapeutic technique using fixed eye positions to access and process traumatic memories held in the brain and body.

Where it fitsCited in the trauma/clinical-referral material, now the Interlude / Appendix B, as a modality for processing trauma beyond the book's core self-help scope.

Availability noteNot available online. Sounds True no longer hosts a page for this book — its store now lists only a Brainspotting online course and an audio release — and the URL previously linked here was a Sounds True interview page written while the book was still forthcoming, not a page for the book. Author, title, publisher and year were verified against the library catalogue record for ISBN 9781604078909 (Sounds True, 2013, LCCN 2012037248).

What it isThis fMRI study found that the human brain's superior temporal sulcus responds more strongly to angry vocal tone (prosody) than neutral tone, even in meaningless speech, showing dedicated neural processing of vocal emotion.

Where it fitsCited in Chapter 6 ('Your Feelings Are Data') as evidence that the brain processes emotional signals automatically: it picks up anger in another person's voice before the words carry any meaning. It is about reading emotion in someone else, not about naming your own, so the affect-labeling material rests on other sources.

What it isGranovetter's foundational sociology paper models how individual "thresholds" for joining a collective behavior, like a riot or trend, combine to produce large-scale social outcomes.

Where it fitsBackground/further-reading source underpinning the book's discussion of social contagion and how environment resets personal standards (Chapter 7).

What it isThis book chapter reviews research applying attachment theory to religious belief and behavior, arguing that people's relationship with the divine mirrors attachment dynamics with caregivers.

Where it fitsCited in Appendix A as background on the psychological/attachment dimension of faith and spiritual practice tools.

What it isAnn Graybiel's review explaining how repeated behaviors become neurologically encoded as habits and rituals through basal ganglia circuits tied to an internal evaluative/reward system.

Where it fitsNo chapter tag given; underpins the book's habit-formation material (e.g., the Daily Pattern/90-Day Program) by explaining the brain circuitry behind habit and ritual formation.

What it isThis classic textbook establishes signal detection theory, a mathematical framework for how observers distinguish true signals from noise under uncertainty, foundational to psychophysics.

Where it fitsCited in Chapter 6 for the signal-versus-noise idea: picking a faint signal out of noise is a decision made under uncertainty, with a threshold that can shift, not a passive readout. That is framing vocabulary. Signal detection theory is about detection and discrimination — an observer's sensitivity versus their response bias — and says nothing about emotional signals or affect labeling.

What it isThis large multi-lab preregistered replication study of the "ego depletion" effect (willpower as a depletable resource) across 23 labs and over 2,000 participants found no significant replication of the original effect.

Where it fitsCited in 'What This Book Claims — and What It Does Not' as an example of a once-famous psychological finding that failed rigorous replication, modeling the book's careful evidentiary standards.

What it isJonathan Haidt's book argues that moral judgments arise primarily from intuition rather than reasoning, and explains how differing moral foundations divide people politically and religiously.

Where it fitsCited in Chapter 7 ('Your Environment Is Quietly Resetting Your Baseline') for its account of moral intuition and group-based social dynamics.

What it isHaidt's 2024 book argues that the shift from a play-based to a phone-based childhood since the early 2010s has driven a sharp rise in adolescent anxiety, depression, and self-harm.

Where it fitsCited near Chapter 11 (agency/letting go) and older draft Chapter 15 material for its evidence on smartphone-driven mental health decline and social deprivation.

What it isA neuropsychology-informed self-help book teaching the 'HEAL' method for using everyday positive experiences to rewire the brain toward lasting contentment and calm.

Where it fitsDirectly supports Chapter 5's theme of training the brain's negativity-biased prediction engine to notice and internalize positive experiences (savoring/gratitude aptitude).

What it isA neuroimaging study showing that both mandatory taxation and voluntary giving to charity activate reward-related brain regions, revealing 'pure altruism' and 'warm glow' motives.

Where it fitsGrounds the book's altruism/generosity-and-wellbeing theme ('it's good to be good'), giving neural evidence that giving is intrinsically rewarding.

What it isThis paper by Hasson and colleagues proposes that cognition is fundamentally interpersonal, reviewing evidence of neural synchronization ("brain-to-brain coupling") between people during communication.

Where it fitsCited in Chapter 9 ('The Conversation Before the Conversation') and Chapter 11 for evidence of neural synchrony underlying communication and co-regulation between people.

What it isA foundational academic book arguing that people unconsciously 'catch' others' emotions through mimicry, feedback, and synchronization of expression and physiology.

Where it fitsProvides the core social-psychology evidence for how environment and relationships silently shape emotional states, supporting Chapter 7's Geography Audit and social-contagion argument; also referenced in Chapter 6 ('Your Feelings Are Data') as core evidence for how emotions transmit between individuals.

What it isThis review by Hayes and colleagues lays out the theoretical model, therapeutic processes, and empirical evidence for Acceptance and Commitment Therapy (ACT), an approach that emphasizes psychological flexibility over symptom elimination.

Where it fitsCited in the trauma/clinical-referral material, now the Interlude 'When PRE►LOΔD Isn't Enough' / Appendix B, as a clinical resource for readers needing more than the book's self-help tools.

What it isThe definitive clinical text on Acceptance and Commitment Therapy (ACT), written by its originators, outlining how psychological flexibility is built through acceptance, defusion, mindfulness, and values-based action.

Where it fitsServes as the clinical-modality backbone for Chapter 6's affect-labeling/Emotional Ledger material and the trauma/clinical-referral content in the Interlude: When PRE►LOΔD Isn't Enough and Appendix B: When You Need More, and informs the agency/letting-go themes of Chapter 11.

What it isA 2019 systematic review and meta-analysis finding that short-term aerobic and high-intensity interval training modestly and inconsistently raised basal testosterone in older men, while resistance training showed no reliable effect on testosterone.

Where it fitsSupports the book's Physical/Biological Pivot material on aerobic and interval training as levers for hormonal and physiological readiness.

What it isAn experimental study finding that intranasal oxytocin combined with social support from a friend most effectively blunted cortisol and anxiety responses to a standardized stress test, more than either alone.

Where it fitsGrounds Chapter 3's stress-mindset/biological-pivot argument and Chapter 8's discussion of relational expectations in the biology of how social bonds buffer the body's stress response.

What it isRachel Herz's review analyzes scientific evidence on how scents affect mood, physiology, and behavior, concluding effects are best explained psychologically, via learned associations, rather than direct pharmacological action.

Where it fitsCited in Chapter 3 (the Biological Pivot, stress mindset) for what the review actually establishes: scent shifts mood and physiology through learned association and expectation, not through direct pharmacological action. Herz is largely debunking aromatherapy's mechanistic claims, so this supports 'what a smell means to you shapes your body's response' — not the claim that a scent by itself changes a stress state.

What it isA General Conference address by Church President Gordon B. Hinckley, delivered in the wake of Hurricane Katrina, urging members toward spiritual and temporal preparedness so they need not fear calamity.

Where it fitsTies directly to PRE►LOΔD's title and Chapter 1 theme of preparation as the antidote to fear, paralleling the book's prediction-engine framing of readiness reducing anxiety.

What it isHochschild and Machung's landmark sociology book documents how working mothers in dual-career households perform a disproportionate "second shift" of unpaid domestic and childcare labor after paid work.

Where it fitsCited in Chapter 8 ('Unspoken Contracts Are Running Your Relationships') as evidence for unspoken, gendered relational contracts around household labor.

What it isIn this 1988 BYU devotional, then-university-president Jeffrey R. Holland speaks on the sacred symbolism of the body, marital unity, and sacramental commitment.

Where it fitsCited in Chapter 9 ('The Conversation Before the Conversation') as LDS spiritual-tradition material on covenant, symbolism, and relational commitment.

What it isA General Conference address by Elder Jeffrey R. Holland urging members to actively pursue reconciliation and forgiveness in strained personal relationships.

Where it fitsSupports Chapter 10's focus on relationship repair, co-regulation, and how individuals shape the people around them, illustrating reconciliation as an active relational practice.

What it isA study finding that participants' reduced perceived stress after an 8-week mindfulness-based program correlated with decreased gray-matter density in the amygdala.

Where it fitsSupports the book's stress-biology material (Chapter 3's Biological Pivot): among 26 stressed but healthy adults who completed an 8-week mindfulness program, the people whose self-reported stress fell the most were the people whose right amygdala grey-matter density fell the most. That is an association between two changes, not evidence that practice reshapes the amygdala — the paper's own word is 'correlates'.

Design caveatNo control group, and the authors report no significant main effect of the training itself on amygdala grey-matter density. The correlation between change in perceived stress and change in density is the whole finding.

What it isA classic 1962 experiment in which blindfolded, lacquer-sensitive students developed skin rashes after being touched with a harmless leaf they were told was poisonous, demonstrating suggestion-driven physical reactions.

Where it fitsProvides a striking historical example for Chapter 3's argument that the brain's stories/predictions can directly produce real bodily (dermatological) responses.

Source caveatThe page range is not settled. Citing works split between 335-350 and 335-352, Kyushu Journal of Medical Science is defunct and not indexed in PubMed, and no primary or library record for volume 13 was reachable to adjudicate. Authors, journal, volume, year and the experiment itself are confirmed; the end page is not.

What it isAn fMRI study finding that giving support to a romantic partner under mild stress activated neural reward and caregiving regions, suggesting that helping others can itself be neurally rewarding.

Where it fitsSupports Chapter 7's social-contagion/relational themes and Appendix C's material on selfless service and connection as sources of well-being.

What it isA review finding that brain serotonergic neurons fire in a slow, steady, wake-state-dependent rhythm linked to motor activity rather than to sensory or emotional processing.

Where it fitsBackground for the book's HRV/exercise material: single-unit recordings in behaving animals show serotonergic neurons firing in step with rhythmic motor activity. The review ties this system to motor output and autonomic coordination rather than to emotion, so it explains why rhythmic movement engages serotonergic circuits — it is not evidence that exercise regulates mood in humans.

What it isA study finding that participants in an intensive three-month meditation retreat showed greater telomerase activity (an enzyme linked to cellular aging) than a waitlist control group, alongside gains in perceived control and purpose in life.

Where it fitsSupports the book's HRV/sleep/biology material by showing how sustained contemplative practice can measurably affect stress-related cellular biology.

What it isAn experiment showing that people instructed to reappraise stress arousal as functional (rather than harmful) showed more adaptive cardiovascular responses and better cognitive performance under pressure.

Where it fitsDirectly underpins Chapter 3's stress-mindset/reappraisal argument that reframing the body's stress story changes physiological outcomes.

What it isThis 2006 hypothesis paper proposes that slow, deep pranayamic (yogic) breathing shifts stretch receptors and vagal afferents to rebalance the autonomic nervous system toward calm.

Where it fitsProvides the proposed physiological mechanism behind the breathwork tools PRE►LOΔD recommends for shifting the body's stress-story and downshifting the nervous system (Chapter 6).

Source caveatThis is a hypothesis paper in Medical Hypotheses, a journal that publishes theoretical proposals without requiring empirical support. The mechanism is plausible and widely cited, but this paper does not test it.

What it isDr. Sue Johnson's bestselling relationship book distills her Emotionally Focused Therapy research into seven conversations aimed at building secure emotional bonds between partners.

Where it fitsSupports Chapter 6's theme of reading emotional data and using affect-labeling and attunement to repair and strengthen close relationships.

What it isJon Kabat-Zinn's landmark book introduces Mindfulness-Based Stress Reduction (MBSR), a program using meditation and body awareness to cope with stress, pain, and illness. First published in 1990 and revised and updated in 2013, with new material on the research that followed.

Where it fitsA foundational text for the mindfulness and body-awareness practices referenced in Chapter 6 and cataloged as a core tool in Appendix A's toolkit.

What it isKahneman and Tversky's paper introducing prospect theory, which shows people weigh losses more heavily than equivalent gains and distort probability judgments in predictable ways. It is the work cited in Kahneman's 2002 Nobel Memorial Prize in Economic Sciences; Tversky had died in 1996 and was ineligible.

Where it fitsCited in Chapter 9 ('The Conversation Before the Conversation') as foundational loss-aversion research underlying the book's Gap-vs-Gain and Emotional Ledger frameworks.

What it isThis classic experiment found that people preferred a longer, more painful cold-water experience over a shorter one when it ended on a less painful note, revealing the 'peak-end rule' in memory.

Where it fitsIllustrates how the brain's retrospective 'ledger' of experience is skewed by how things end, informing the book's discussion of gaps between predicted and remembered experience.

What it isA posthumously published memoir by neurosurgeon Paul Kalanithi reflecting on meaning, mortality, and identity after his terminal lung cancer diagnosis.

Where it fitsCited in the book's introductory 'Architect's Blueprint' material as a narrative touchstone for confronting mortality and meaning, tying into the whole-person and agency themes.

What it isKappes and Oettingen's studies show that vividly fantasizing about idealized future success lowers physiological energy and effort, making the outcome less likely.

Where it fitsWarns against passive positive fantasizing as a substitute for action, reinforcing the book's emphasis on realistic mental contrasting over wishful thinking.

What it isA parenting guide by Yale psychologist Alan Kazdin presenting a behavioral, reward-based method for managing defiant and difficult child behavior without punishment.

Where it fitsCited in the book's relational and habit-formation material, as applied behavioral science on shaping behavior through positive reinforcement rather than willpower or punishment.

Availability noteNo publisher page for this book is reachable: Houghton Mifflin's trade list has since changed hands, and the successor publisher's pages block automated access. Title, subtitle, the 'with Carlo Rotella' credit, publisher and year were verified against a library catalogue record for ISBN 9780618773671; the link here is a library catalogue record rather than a publisher page.

What it isThis study on the classic 'marshmallow test' found that children's willingness to delay gratification depends on their rational belief about whether an adult's promise is reliable, not just willpower.

Where it fitsReframes self-control and delayed gratification as a rational, trust-based calculation, informing the book's ideas about habit formation and reliability of environment/expectations.

What it isA classic study finding that medical students' immune function measurably weakened during high-stress exam periods compared to a lower-stress baseline.

Where it fitsSupports the book's Biological Pivot chapter as foundational evidence linking psychological stress to measurable immune suppression.

What it isThis meta-analysis of workplace studies confirms the Pygmalion effect: when supervisors expect more from employees, performance measurably improves.

Where it fitsSupports the book's discussion of how leaders' unspoken expectations shape others' behavior and performance, tying to Chapter 10's co-regulation/Pygmalion themes and Chapter 11's agency material.

What it isUsing an experience-sampling smartphone app, Killingsworth and Gilbert found people's minds wander nearly half of waking hours, and mind-wandering itself predicts lower happiness regardless of the activity.

Where it fitsGrounds Chapter 5's argument that training attention toward the present (savoring) rather than letting the mind wander is key to well-being.

What it isThe paper introducing the Trier Social Stress Test, a standardized laboratory protocol (public speaking plus mental arithmetic before an audience) used to reliably induce and measure the body's stress response.

Where it fitsCited in Chapter 3 as the standard experimental method behind much of the stress-reappraisal research the book draws on.

What it isA Harvard Business Review article by cognitive psychologist Gary Klein proposing the 'premortem' technique — imagining a project has already failed to surface hidden risks before they happen.

Where it fitsListed as further/background reading relevant to the book's agency and planning themes around anticipating problems before they derail progress.

What it isA systematic review of animal studies examining whether environmental enrichment modulates hippocampal BDNF expression and neurogenesis.

Where it fitsSupports the exercise/environment-biology material on BDNF and brain plasticity as a preparation lever.

Scope caveatThis is a systematic review of animal studies — rodent hippocampal tissue, with enrichment conditions no human experiment reproduces. It establishes that environmental enrichment modulates BDNF expression in those models; it does not establish the effect in humans, and the review itself reports inconsistency across the studies it pools. Treat it as mechanism, not as evidence about people.

What it isThis PNAS study found that people trained in the Wim Hof Method (breathing, cold exposure, meditation) could voluntarily activate their sympathetic nervous system and dampen their innate immune/inflammatory response.

Where it fitsDirectly supports Chapter 3's thesis that the body takes physiological orders from a controllable 'story,' showing voluntary techniques can shift core biological stress responses.

What it isPsychologist Ethan Kross's book examines the inner voice of self-talk, explaining when it helps versus harms us and offering evidence-based tools to harness it productively.

Where it fitsDirectly informs Chapter 6's practice of naming and reading one's internal emotional dialogue as data rather than being controlled by unmanaged 'chatter.'

What it isThis theoretical paper proposes that the subjective feeling of mental effort reflects an implicit cost-benefit calculation about better uses of limited cognitive resources, rather than a fixed willpower reservoir.

Where it fitsCited in the book's epistemology note as a model for how effort and motivation are computed, informing the book's careful, evidence-based framing of self-regulation claims.

What it isA study using 'the dress' photo illusion to show that individuals genuinely perceive the same colors differently due to variation in how their brains infer lighting conditions.

Where it fitsSupports the book's prediction-engine brain-model framework (Chapter 1/2) as vivid evidence that perception is a construction, not a passive readout of reality.

What it isDavid Laibson's classic economics paper models how people with 'hyperbolic' time preferences overvalue immediate rewards and need commitment devices to save for the future.

Where it fitsIllustrates Chapter 3's theme of cognitive biases about time and control, showing how the brain's story about immediate versus future reward can override rational planning until the narrative is changed.

What it isA field study tracking 96 volunteers forming a new daily habit, finding automaticity develops gradually along a curve and takes far longer on average than the popular '21 days' myth suggests.

Where it fitsCore evidence for the book's habit-formation chapter (Chapter 5 / Part Five's 90-Day Program), grounding realistic expectations for how long behavior change actually takes.

What it isA study of 101 healthy men sampling blood directly from the jugular vein, finding that brain serotonin turnover was lowest in winter and rose in direct proportion to the hours of bright sunlight on the day of measurement.

Where it fitsCited in Appendix E (The Biology Beneath the Four Dimensions) as one of the two honest levers that reach brain serotonin directly — bright light and aerobic movement — and a rare case of the neurotransmitter measured in the brain itself rather than inferred.

Scope caveatThe design is observational, not experimental. Serotonin turnover was correlated with season and with the hours of bright sunlight on the day of measurement; no one manipulated anyone's light exposure. That makes light a reliable correlate of brain serotonin turnover here. Calling it a lever is a claim this study supports but does not itself test.

What it isEllen Langer's landmark study demonstrated that people often overestimate their control over chance outcomes when skill-related cues (like choice or competition) are present.

Where it fitsDirectly supports Chapter 3's argument that our sense of control is often a constructed story rather than objective reality — Langer's studies show people reading skill into outcomes that were pure chance.

What it isAn MRI study finding that experienced meditators had thicker cortical regions associated with attention and sensory processing than non-meditators, suggesting meditation may offset age-related brain thinning.

Where it fitsSupports the book's HRV/sleep/exercise biology material as neuroscientific evidence that long-term contemplative practice is associated with measurable structural differences in the brain.

Design caveatA cross-sectional comparison of experienced meditators against matched non-meditators — not a longitudinal or randomised study. It cannot establish that practice caused the differences, because people who take up years of meditation may differ beforehand. The authors frame the result as suggestive, and the description above follows them.

What it isA review explaining the physiological mechanisms behind heart rate variability biofeedback, proposing that it works partly by strengthening baroreceptor reflexes and vagal pathways to the brain.

Where it fitsDirectly supports the book's HRV-focused biology material explaining why breathing-based biofeedback techniques help regulate the stress response.

What it isPsychiatrist Anna Lembke's bestselling book arguing that constant pursuit of pleasure in a dopamine-saturated modern world drives compulsive overconsumption, and offers strategies for restoring balance.

Where it fitsSupports the book's habit-formation and emotional-regulation themes, illustrating the neuroscience of reward, craving, and behavior change among the Selected Sources.

What it isA study showing that unfinished tasks leave 'attention residue' that persists into subsequent tasks, impairing focus and performance until the first task is mentally resolved.

Where it fitsCited in Chapter 10 ('How You Are Already Shaping Everyone Around You') regarding how divided attention and unresolved cognitive loads affect presence and interactions with others.

What it isAn early experimental study finding that observers' own laughter while watching a slapstick film shaped how funny they subsequently rated it, showing physiological expression can feed back into emotional evaluation.

Where it fitsSupports the book's Emotional Ledger chapter as evidence that bodily expression and felt emotion are tightly, bidirectionally linked, among the Selected Sources on affect.

Availability noteThe full text is not available online — Wiley's copy is paywalled and blocks automated retrieval, and the PubMed record carries no abstract — so the finding as described above could not be checked against the original. The bibliographic facts are confirmed at Crossref and PubMed (PMID 5435826). One caution: MEDLINE indexes the study under Child, with no adult age descriptor, so the 'observers' were most likely children.

What it isPeter Levine's foundational book on Somatic Experiencing argues that trauma is stored in the body and can be released through guided physical awareness rather than talk therapy alone.

Where it fitsA core clinical reference for the trauma-informed material now in the Interlude/Appendix B, pointing readers toward professional somatic trauma treatment when PRE►LOΔD's tools aren't enough.

What it isThis Yale study found that in rats, ketamine rapidly activates the mTOR pathway and drives new spine synapses in the prefrontal cortex — and that blocking mTOR signalling abolishes both the synapse growth and the antidepressant-like behavioural response. It is the leading candidate mechanism for ketamine's speed.

Where it fitsSupports the Interlude/Appendix B discussion of the biological underpinnings of depression treatment, reinforcing that severe depression may need clinical/pharmacological intervention beyond self-guided reappraisal. The evidence that ketamine works fast in people comes from clinical trials; this paper supplies the mechanism behind it.

What it isThis fMRI study showed that simply labeling one's emotions in words ('affect labeling') reduces amygdala activity in response to distressing images.

Where it fitsDirectly underpins Chapter 6's 'Emotional Ledger' concept and the practice of naming feelings as a concrete neurological regulation tool, referenced again in the Appendix A toolkit.

Scope caveatThe study showed amygdala attenuation with vmPFC engagement during affect labelling. It did not test whether labelling reduces felt distress, nor whether it works when practised repeatedly. The mechanism is real; treating it as a regulation tool is an extension a single fMRI session cannot validate.

What it isNeuroscientist Matthew Lieberman's book argues that the human brain is fundamentally wired for social connection, with dedicated neural systems for social pain, mindreading, and group harmony.

Where it fitsCentral to Chapters 6 and 10's themes of the social brain, co-regulation, and how humans are wired to shape and be shaped by those around them.

What it isMarsha Linehan's manual detailing Dialectical Behavior Therapy skills modules: mindfulness, distress tolerance, emotion regulation, and interpersonal effectiveness. Cited here in the 2025 revised edition, which updates the second edition for changes in language, technology and daily life.

Where it fitsCited in Chapter 6 ('Your Feelings Are Data. Start Reading the Ledger.') as a clinical source underlying the book's emotional-labeling and distress-tolerance strategies.

What it isAn ambulatory assessment study of 55 university students, rating their music listening and stress four times a day through a normal term week and an examination week, with a 25-student subsample also giving saliva samples. Music listening was associated with lower subjective stress, most strongly when relaxation was the stated reason for listening — which also went with lower cortisol. Salivary alpha-amylase tracked the arousal of the music, rising with energising music and falling with relaxing music.

Where it fitsSupports the practical stress-reduction toolkit (music as a regulation strategy), fitting the biological-pivot and Appendix A toolkit themes.

Design caveatObservational, not experimental. Participants chose what to listen to and when, so these are associations between everyday listening and stress markers rather than the effect of music that was administered and controlled.

What it isA diary study of 53 participants reporting on stress, music listening and the presence of others five times a day for seven days, with a saliva sample at each report. Music listening on its own showed no stress-reducing effect. Listening with other people present went with lower subjective stress and attenuated cortisol — but higher salivary alpha-amylase, meaning more autonomic activation, not less. Listening alone lowered stress only when relaxation was the stated reason.

Where it fitsComplements the companion Linnemann 2015 finding in the practical stress-reduction toolkit, adding the social-context nuance relevant to co-regulation themes.

Design caveatObservational diary data, so these are associations rather than effects — and they split across measures, cortisol falling while alpha-amylase rose. The paper's own title promises more than its results deliver.

What it isThis study found that among healthy young adults, lower perceived control during a standardized social stress test was associated with a greater cortisol (HPA-axis) stress response.

Where it fitsA background reference reinforcing Chapter 3's biological pivot: perceived control tracks with the body's stress-hormone response, not just with subjective feeling.

Design caveatCorrelational. All 54 participants received the same Trier Social Stress Test with objective controllability held fixed; only perceived control varied, and it correlated with the cortisol response at r = −0.414. Nothing was manipulated, so the study shows that perceived control tracks the response — not that it drives it.

What it isThe official Canadian government inquiry report into the 1983 'Gimli Glider' incident, in which an Air Canada Boeing 767 ran out of fuel mid-flight and was safely glided to a landing. The inquiry traced the fuel shortage to a combination of causes: the aircraft was dispatched with an inoperative fuel-quantity indicating system and blank fuel gauges, so the load had to be measured by drip stick — and the litres-to-kilograms step of that calculation was done with a pounds-per-litre conversion factor.

Where it fitsSupports the book's prediction-engine framework (paired with the Mars Climate Orbiter story in Chapter 1) as another real-world case of how small errors in underlying assumptions cascade into major consequences — and how trained responses under stress can still recover the situation.

What it isStanford researcher Fred Luskin's book presenting a research-based nine-step method for forgiveness and its documented benefits for emotional and physical health.

Where it fitsCited in Chapter 10 material on relationships and co-regulation, supporting the book's treatment of forgiveness and letting go of grievances as part of healthy relational functioning.

What it isThis study identified specialized slow-conducting nerve fibers (C-tactile afferents) in human skin that respond most strongly to gentle, caress-like stroking, coding it as pleasant.

Where it fitsGrounds Chapter 8's exploration of touch and relational/attachment needs in hard neuroscience, showing the body has a dedicated biological channel for affectionate physical contact.

What it isA major 50-years-later review arguing that the original learned-helplessness theory had it backwards: passivity after uncontrollable stress is the brain's default response, actively inhibited by a sense of control, not a learned behavior.

Where it fitsCentral to Chapter 11's 'Letting Go Without Giving Up' (Sphere of Agency), since it reframes helplessness/agency as a modulated default state rather than something purely learned.

What it isA clinician's manual describing behavioral activation, an evidence-based therapy that treats depression by helping patients re-engage in meaningful, rewarding activities.

Where it fitsA further-reading clinical resource supporting the Interlude/Appendix B depression referral material for readers who need professional treatment beyond PRE►LOΔD's scope.

What it isA psychology study finding that simply making a concrete plan for an unfinished goal — not completing it — is enough to quiet the intrusive, nagging thoughts that unfinished goals normally cause.

Where it fitsSupports Chapter 10's discussion of how clear plans and commitments free up mental bandwidth and reduce background stress in relationships and interactions.

What it isA neuroscience review arguing that intermittent fasting and other forms of metabolic switching trigger cellular adaptations that strengthen neural networks and protect the brain against stress and disease.

Where it fitsCited among the Selected Sources supporting the Biological Pivot material on how metabolic and lifestyle inputs (fasting, exercise) shape brain resilience and stress response.

Scope caveatA mechanism review whose core is largely rodent and cell work. The human evidence that intermittent fasting improves brain health is considerably thinner than the cellular story it rests on. Sound as an account of the proposed mechanism; not a demonstrated human benefit.

What it isA leadership book by John C. Maxwell arguing that failures and losses, properly examined, are the richest source of personal growth and learning.

Where it fitsUsed in Chapter 4 ('Why Winning Still Feels Empty') to illustrate reframing losses as learning rather than pure defeat, reinforcing the Gap vs. Gain mindset shift.

What it isA landmark fMRI study showing that immediate and delayed monetary rewards are evaluated by two distinct brain systems — an emotional/limbic system favoring instant gratification and a prefrontal system capable of weighing long-term payoffs.

Where it fitsSupports Chapter 3's Biological Pivot argument that self-control and delayed gratification are rooted in a measurable neural competition rather than pure willpower.

What it isThis HeartMath Institute study found that different emotional states (like anger versus appreciation) produce distinct, measurable patterns in heart rate variability.

Where it fitsEarly evidence for the book's HRV-based practical toolkit themes, linking emotional state directly to measurable heart-rhythm biology used in stress-reduction techniques.

Source caveatA small 1995 study by HeartMath Institute researchers: anger produced a sympathetically dominated power spectrum, appreciation shifted power toward mid- and high-frequency activity. The finding is real and peer-reviewed, but the independent, better-powered receipt for the HRV toolkit is Lehrer and Gevirtz (2014), earlier in this list.

What it isA HeartMath Institute paper proposing that heart-brain synchronization ('coherence') is a measurable physiological state linked to emotional regulation and system-wide bodily order.

Where it fitsCited among the Selected Sources on HRV/biological-pivot material as the originating theoretical statement of the HeartMath coherence model, rather than as independent evidence for it.

Source caveatA 105-page in-house monograph by HeartMath Institute staff, published in Integral Review — an open-access transdisciplinary journal, not an indexed physiology venue. 'Coherence' as used here is HeartMath's own construct, not a standard psychophysiological measure. The independent mechanism evidence for HRV biofeedback is Lehrer and Gevirtz (2014).

What it isBruce McEwen's influential review elaborating 'allostatic load' — the concept he introduced with Eliot Stellar in 1993 — the idea that chronic stress hormones which normally help the body adapt can, over time, accumulate and damage multiple organ systems. This is the paper that carried the model to a clinical audience.

Where it fitsFoundational to Chapter 3's Biological Pivot, explaining the physiological mechanism by which chronic stress mindsets translate into real bodily wear and disease risk.

What it isThe classic paper documenting the 'McGurk effect,' in which mismatched audio and lip-movement cues cause people to perceive a speech sound different from what was actually said or heard.

Where it fitsCited among the Selected Sources illustrating how the brain actively constructs perception from multiple sensory streams, reinforcing the book's prediction-engine brain model.

What it isA review paper showing that restricted or fragmented sleep disrupts the body's autonomic nervous system and stress hormone regulation, making people more reactive to future stressors.

Where it fitsGrounds Chapter 3's argument that the body 'takes orders' from sleep and stress biology, showing why poor sleep primes the nervous system for an exaggerated stress response.

Scope caveatA review that draws heavily on animal sleep-restriction experiments, where sleep loss can be imposed far more severely than in any human study. The direction of the finding holds in humans too; the magnitude implied by the animal work is not a human dose-response curve.

What it isA classic theoretical chapter in which Neal Miller extends stimulus-response learning theory to explain approach-avoidance conflict, motivation, and social learning.

Where it fitsProvides the foundational conflict/motivation psychology behind the book's discussion of competing internal drives and mixed motivations in goal pursuit (Chapter 4's Gap vs. Gain themes).

What it isWalter Mischel's popular book revisiting his famous 'marshmallow test' studies to explain the psychology of self-control and delayed gratification and how it can be strengthened.

Where it fitsDirectly supports Chapter 8's exploration of delay of gratification and unspoken expectations around self-control and willpower.

Replication caveatThe long-range predictive power of the marshmallow test is much weaker than the popular account suggests. Watts, Duncan and Quan (2018) reproduced the study in a far larger, more representative sample and found the association with later outcomes roughly halved, and largely accounted for by family background and socio-economic circumstances rather than by willpower itself.

What it isAn fMRI study finding that voluntary charitable giving activates the same brain reward circuits as receiving money, while also engaging regions tied to social attachment.

Where it fitsSupports Chapter 7's Geography Audit material, showing that generosity toward others biologically rewards the giver.

Scope caveatA single-session fMRI study of individual donation decisions. It shows what giving does to the giver's reward circuitry and measures nothing about whether generosity spreads, so it cannot carry a social-contagion claim on its own.

What it isA First Presidency message by President Thomas S. Monson urging Latter-day Saints to be spiritually, financially, and practically prepared before crises arrive.

Where it fitsUsed in the Conclusion (The Blueprint in Your Hands) to underscore the book's prediction-engine theme: preparation shapes outcomes because decisions are made using pre-loaded patterns, not built fresh in the moment.

Availability noteThe printed page range is unconfirmed. The online edition at churchofjesuschrist.org carries no pagination — and that is where the author, the exact title, the First Presidency Message designation, the September 2014 issue and the quotation itself were all verified. 4–6 is plausible for a First Presidency Message, which opens the issue, but it has not been checked against print.

What it isA meta-analysis of 17 studies finding that higher social support was not significantly associated with longer telomere length.

Where it fitsAdds nuance to the book's social-connection and cellular-aging material, paralleling the Epel telomere work while noting the relationship is small to null.

What it isThe landmark 1949 paper demonstrating, in cats, that electrical stimulation of the brainstem's reticular formation activates and desynchronizes the EEG — establishing the basis of the ascending reticular activating system.

Where it fitsUnderpins Chapter 5's discussion of arousal and the brain's activation systems, tying into savoring and attention training. What this paper established is brainstem control of cortical arousal; the attentional filtering and prioritising described in that chapter is sourced to attention research, not to this study.

What it isA psychology study finding that students who take notes by hand retain and conceptually understand lecture material better than those who type notes on laptops, likely due to deeper mental processing.

Where it fitsUsed in Chapter 4 to support practical habit-formation advice about how the method of engaging with information (not just effort) shapes learning and retention.

Replication caveatThe longhand advantage is not settled. Morehead, Dunlosky and Rawson (2019) ran a direct replication and did not reproduce the benefit, and a meta-analysis of direct replications found effects that were small and not statistically significant. The broader point — that how you engage with material matters, not just how hard you try — does not rest on this study alone.

What it isA practical guide by speech-language pathologist Linda K. Murphy teaching 'declarative language' — comment-based, non-directive phrasing in place of questions and commands. It is written for parents and clinicians supporting children with social-learning challenges, to help them feel competent, connected and understood.

Where it fitsCited in Chapter 9 ('The Conversation Before the Conversation') as a communication-technique resource for framing dialogue in ways that reduce defensiveness and build connection. Murphy wrote it for adults talking with children; carrying the same phrasing into adult conversation is an extension of her work rather than her stated claim.

What it isA foundational neuroscience study in rats showing that a consolidated fear memory, once reactivated by retrieval, returns to a labile state: infusing a protein-synthesis inhibitor into the amygdala just after reactivation produced amnesia on later tests, while the same infusion without reactivation left the memory intact. Memories can be altered after retrieval.

Where it fitsCited among the Selected Sources underpinning the book's discussion of how emotional memories can be revised, relevant to affect labeling and letting-go material.

Scope caveatThis is a rodent protein-synthesis experiment. It opened the reconsolidation question rather than settling it — human reconsolidation research is active and its results are mixed, and nothing here speaks to revising the stories attached to a memory.

What it isThe UK's official clinical guideline (published June 2022) for identifying, treating, and managing depression in adults using a matched-care, stepped treatment model.

Where it fitsSupports Chapter 6's Emotional Ledger framing of feelings as clinical data and grounds the book's trauma-informed referral material in the Interlude and Appendix B on when readers need professional care.

What it isA foundational study by Kristin Neff and colleagues showing that self-compassion (distinct from self-esteem) buffers against anxiety and supports adaptive psychological functioning.

Where it fitsAnchors Chapter 11's 'Letting Go Without Giving Up' and the Sphere of Agency concept, as well as the self-compassion themes in the Interlude/Appendix B material.

What it isKristin Neff's foundational book presenting research showing that treating oneself with kindness during failure or difficulty builds more durable motivation and emotional resilience than harsh self-criticism.

Where it fitsCited in Chapter 11 and the trauma-informed material in the Interlude (When PRE►LOΔD Isn't Enough) and Appendix B, supporting the book's emphasis on self-compassion as part of letting go without giving up on standards.

What it isA pilot study and randomized controlled trial showing that the 8-week Mindful Self-Compassion program significantly increases self-compassion, mindfulness, and well-being while reducing anxiety and depression.

Where it fitsSupports the self-compassion practices discussed in the Interlude/Appendix B trauma and emotional-health referral material.

What it isA General Conference address by President Russell M. Nelson teaching that lasting joy comes from centering one's life on Jesus Christ rather than on circumstances.

Where it fitsCited in Chapter 4's Gap-vs-Gain material and later gratitude-related content, reinforcing the book's LDS/multi-faith spirituality thread on finding durable joy independent of outcomes.

What it isA neuroscience-of-religion book by Andrew Newberg and Mark Waldman presenting brain-scan evidence that prayer, meditation, and contemplating God can reduce stress, ease anxiety, and reshape brain structure.

Where it fitsCited in Appendix C (Faith Traditions Converge) to ground the book's LDS/multi-faith spiritual material in neuroscientific evidence for how spiritual practice physically changes the brain.

What it isA study showing that increases in BDNF mediated cognitive-performance gains after computerized cognitive training in healthy older adults.

Where it fitsSupports the brain-plasticity material, linking trainable cognitive practice to a molecular mechanism (BDNF) of cognitive improvement.

Scope caveatThe mediation result comes from the trial's computerised cognitive-training arm. 144 healthy older adults completed a five-week intervention randomised across working-memory training, physical exercise, mindfulness meditation, or an active control; only the cognitive-training group showed increased BDNF and improved performance relative to control. The physical-exercise arm did not.

What it isA study finding that a two-week 'Best Possible Self' visualization exercise lowered participants' cortisol response to waking and to acute laboratory stress.

Where it fitsDirectly supports Chapter 3's claim that mental imagery and story can physiologically pivot the body's stress response, lowering cortisol reactivity.

What it isA randomized, placebo-controlled trial finding that a short-term intravenous S-ketamine infusion produced only brief pain relief in fibromyalgia patients, with no lasting analgesic benefit.

Where it fitsUsed in the Interlude/Appendix B clinical material as evidence on the limits of a single short ketamine infusion for fibromyalgia pain, reinforcing the book's trauma-informed referral guidance.

Design caveatA 24-patient trial: 12 received a 30-minute S-ketamine infusion, 12 an active midazolam placebo, with follow-up weekly for eight weeks. Relief tracked ketamine's plasma concentration and then faded, and across the follow-up there were no significant differences between groups. Solid evidence about one short infusion of one drug in one condition — not about pharmacological treatment of chronic pain in general.

What it isA two-experiment study introducing 'defensive pessimism': some anxious people set deliberately low expectations and mentally rehearse worst-case outcomes so that their anxiety does not become debilitating. The strategy does not make them outperform anyone — it keeps low expectations and high anxiety from producing the performance deficit those usually cause, and a second experiment showed that interfering with the strategy is what impairs their performance.

Where it fitsInforms the book's treatment of anxiety-as-motivation and mindset strategies related to Chapter 4's Gap vs. Gain and goal-pursuit themes.

What it isA review by Ochsner and Gross on how deliberate cognitive strategies, especially reappraisal, engage prefrontal brain regions to regulate and reshape emotional responses.

Where it fitsCited among the Selected Sources underlying the Emotional Ledger/affect-labeling chapter's account of how reframing thoughts changes felt emotion at a neural level.

What it isA study by Oettingen, Pak, and Schnetter showing that mentally contrasting a desired future with present reality (versus just fantasizing) turns vague wishes into binding, expectation-based goals.

Where it fitsUnderpins the mental-contrasting/goal-setting toolkit technique used in PRE►LOΔD's goal-setting material and the Appendix A toolkit.

What it isA book chapter detailing the mental contrasting and implementation-intentions technique, a two-step method for translating positive future thinking into concrete goal-directed action.

Where it fitsDirectly supports the practical toolkit methods referenced in the Part Five 90-Day Program and Appendix A's toolkit-at-a-glance summary.

What it isA comprehensive review of fantasy realization theory, showing that positive fantasies about the future can undermine effort unless paired with realistic mental contrasting.

Where it fitsSupports the book's discussion of how imagined futures and expectations shape motivation and behavior change, relevant to Chapter 4's Gap vs. Gain themes.

What it isGabriele Oettingen's book introducing WOOP (Wish, Outcome, Obstacle, Plan) and mental contrasting, research-backed alternatives to simple positive-thinking visualization for achieving goals.

Where it fitsCited across the habit-formation material and Appendix A toolkit, supporting the book's practical techniques for turning intentions into sustained behavior change.

What it isA foundational text by Ogden, Minton, and Pain integrating neuroscience, attachment theory, and body-oriented interventions for treating trauma.

Where it fitsGrounds the book's trauma-informed referral guidance, reinforcing that unresolved trauma often requires somatic/body-based clinical approaches beyond mindset techniques.

What it isA clinical text by Pat Ogden and Janina Fisher detailing body-based (sensorimotor) psychotherapy techniques for treating trauma and attachment wounds.

Where it fitsSupports the trauma-informed clinical referral material in the book's Interlude/Appendix B section on when body-based therapy is needed beyond self-help techniques.

What it isA review describing how cueing memories with sounds or smells during sleep (targeted memory reactivation) can strengthen and enhance retention of what was learned while awake.

Where it fitsCited among the Selected Sources supporting the book's sleep-biology material on how sleep actively consolidates and strengthens memory and skill learning.

What it isMaria Ovsiankina's classic 1928 experimental study (from Kurt Lewin's lab) showing people have a strong tendency to spontaneously resume interrupted tasks.

Where it fitsProvides the historical research basis for the unfinished-task persistence dynamic discussed in Chapter 10's exploration of how incomplete goals continue to exert psychological pull.

What it isOyserman and Destin's paper introducing 'identity-based motivation,' a framework explaining how people's sense of who they are shapes their goal pursuit and can be leveraged in interventions.

Where it fitsSupports Chapter 10's argument that identity and social context shape motivation and behavior, informing the book's discussion of self-concept-driven habit change.

What it isA self-published clinical manual by Peggy Pace describing 'Lifespan Integration,' a body-based therapy technique using repeated timelines to help clients integrate traumatic memories.

Where it fitsCited as a specialized trauma-therapy modality in the Interlude/Appendix B referral material for readers whose needs go beyond the book's self-directed tools.

Availability noteThis is a self-published clinical manual with poor bibliographic control. The work is well attested, but no publisher catalogue page, library record or trade database confirms the 2012 fourth edition named here: records give a 2003 original, a 2007 printing (ISBN 9780976060314, publisher recorded only as self-published) and a 2015 printing under Eirene Imprint, and no record anywhere states a fourth edition or the publisher 'Pace Works'. The link goes to the Lifespan Integration organisation's own books page, which lists the title under ISBN 0976060361 but gives no year, edition or publisher. Treat the year, edition and publisher in this citation as unverified.

What it isKenneth Pargament's landmark text examining how religious and spiritual beliefs help (and sometimes hinder) people coping with stress and adversity.

Where it fitsSupports Appendix A's inclusion of religious/spiritual coping as a legitimate toolkit technique, aligning with the book's multi-faith spiritual preparation themes.

What it isA study finding that group singing produces faster social bonding among strangers than other shared activities like crafting or creative writing.

Where it fitsCited in the Faith Interlude material to support the role of communal ritual (such as congregational singing) in rapidly building social connection and belonging.

What it isPennebaker and Beall's seminal experiment showing that expressive writing about traumatic experiences improves health outcomes compared to writing about trivial topics.

Where it fitsGrounds the expressive-writing technique recommended in Appendix A's toolkit and referenced in the Interlude/Appendix B as an evidence-based emotional-processing tool.

What it isChild psychiatrist Bruce Perry and journalist Maia Szalavitz recount clinical case studies of traumatized children, illustrating the brain's capacity for healing.

Where it fitsIllustrates Chapter 6's 'Emotional Ledger' themes of how early trauma and attachment shape the nervous system and later emotional patterns.

What it isA Trier Social Stress Test study finding that psychosocial stress raises salivary alpha-amylase activity independently of plasma noradrenaline levels.

Where it fitsSupports the stress-physiology and biomarker material, validating salivary alpha-amylase as a readout of the acute stress response.

What it isOlympic swimmer Michael Phelps's memoir, co-written with Alan Abrahamson, recounting the mental preparation and training discipline behind his record-setting career.

Where it fitsCited among the Selected Sources as a real-world example of mental preparation, goal-setting, and disciplined habit formation supporting the book's performance-psychology themes.

What it isA human study showing exercise induces a dramatic transient activation of PGC-1alpha gene transcription in skeletal muscle.

Where it fitsAnchors the exercise-biology / 'Biological Pivot' material on how a single bout of exercise switches on genes driving mitochondrial and metabolic adaptation.

What it isA sports-science review explaining how heart rate variability (HRV) tracks how well elite athletes are adapting to and recovering from training load.

Where it fitsCited among the Selected Sources supporting the book's HRV/biology material on using physiological markers to monitor stress, recovery, and readiness.

What it isStephen Porges introduces 'neuroception,' the brain's unconscious process of detecting cues of safety, danger, or threat from the environment and other people.

Where it fitsDirectly supports Chapter 7's discussion of how environmental safety cues quietly reset the nervous system's baseline standards.

Availability noteZERO TO THREE is a practitioner bulletin rather than a peer-reviewed journal, and it registered no DOIs for its 2004 issues: there is no DOI for this article and no publisher-hosted copy of it online. The linked PDF is a full copy of the original bulletin pages, reproduced with the copyright holder's permission — the notice on its first page says so. The citation itself was verified against the ERIC bibliographic record (EJ938225): Zero to Three, v24 n5, pp. 19–24, May 2004, ISSN 0736-8038.

What it isStephen Porges's foundational text laying out the Polyvagal Theory, which describes how the vagus nerve and autonomic nervous system shape emotional regulation, social connection, and responses to safety and threat.

Where it fitsCited repeatedly (Chapters 3, 6, 10, and the trauma-informed Interlude/Appendix B material) as the core physiological framework underlying the book's discussion of nervous-system states, co-regulation, and safety cues.

Source caveatPolyvagal theory is a theory, not consensus physiology. Its comparative-anatomy and evolutionary premises have been substantively challenged in the peer-reviewed literature, most prominently by Grossman and Taylor, and the dispute is unresolved. The measurable phenomena the book's practices actually rest on — heart-rate variability, respiratory modulation of vagal tone, co-regulation effects — hold regardless of whether Porges's evolutionary account is correct.

What it isStephen Post reviews research linking altruistic, prosocial behavior to greater happiness, health, and longevity.

Where it fitsSupports Chapter 7's discussion of altruism and prosocial behavior as part of how one's social environment and habits shape wellbeing.

What it isA Science study showing that pairing a conditioned stimulus with an expected sensory outcome can induce hallucination-like perceptions, revealing how strong perceptual priors can override real sensory evidence.

Where it fitsTagged to Chapter 6 ("Your Feelings Are Data"), this supports the book's prediction-engine framework by showing the brain can generate perception from expectation alone, even overriding real sensory input.

What it isNeuroscientist Robert Provine's research-based investigation into laughter as an involuntary, contagious social signal rather than merely a response to humor.

Where it fitsCited among the Selected Sources supporting the book's social-contagion material on how emotional and behavioral signals spread automatically between people.

What it isA short PNAS paper noting that the brain consumes a disproportionate 20% of the body's energy despite being only 2% of its weight, largely to sustain ongoing background ('default mode') activity.

Where it fitsCited among the Selected Sources grounding the prediction-engine brain model in the fact that the brain is constantly active generating predictions, not just reacting to stimuli.

What it isA comparative study showing that vigorous running triggers endocannabinoid signaling (the body's own cannabis-like compounds) in humans and other running-adapted mammals, likely producing the 'runner's high.'

Where it fitsCited among the Selected Sources supporting the book's exercise-biology material on the neurochemical rewards of aerobic activity.

What it isA study finding that mental/imagined muscle-contraction training alone, without physical exercise, produced measurable strength gains linked to increased cortical output.

Where it fitsCited in Appendix A ("The Toolkit at a Glance") for a narrow but striking result: twelve weeks of imagined maximal contractions, with no physical exercise at all, produced measurable isometric strength gains in the trained movement, along with a matching rise in cortical drive. It supports mental rehearsal having a real motor-cortical signature — not visualization as a general-purpose tool for goal pursuit or performance, which are separate constructs with their own mixed literatures.

Design caveatSmall single-lab experiment: 30 volunteers in groups of eight (imagined little-finger abduction, imagined elbow flexion, untrained control) plus six who trained physically, over 12 weeks at 15 minutes a day, five days a week. Imagined training raised finger-abduction strength 35% and elbow-flexion strength 13.5%; physically training the same movement raised it 53%. The effect is real and measured on one trained joint action — and smaller than doing the work.

What it isPsychiatrist John Ratey's book synthesizing research on how exercise improves mood, learning, stress resilience, and overall brain function.

Where it fitsCited in Chapters 3 and 6 to support the book's exercise-biology arguments linking physical activity to improved emotional regulation and cognitive performance.

What it isA study of colonoscopy and lithotripsy patients showing retrospective pain memories are shaped mainly by the peak and end moments of an experience, not its duration or average intensity.

Where it fitsListed as a background/further-reading reference; its "peak-end rule" finding supports the book's discussion of how memory and narrative (rather than raw experience) shape our felt history of stress and hardship.

What it isA pilot randomized trial in 70 Stage B heart failure patients: eight weeks of gratitude journaling reduced an inflammatory biomarker index and raised parasympathetic HRV during the journaling task itself. Resting HRV, measured before and after the intervention, showed no significant group differences.

Where it fitsSupports the gratitude/'savoring' chapter and the HRV material as preliminary clinical evidence that gratitude practice can move an inflammatory marker and produce a parasympathetic response in the moment. What it does not show is a shifted resting baseline, so the book treats it as suggestive rather than as evidence of trained physiological capacity.

Design caveatThe comparator was treatment as usual, not an active control, so expectancy and attention effects are not ruled out, and the sample is 70 patients with Stage B heart failure. The authors conclude only that gratitude journaling may improve biomarkers related to heart-failure morbidity, and that "large-scale studies with active control conditions are needed to confirm these findings."

What it isAn American Journal of Psychiatry review summarizing clinical research on psychedelics such as psilocybin and MDMA as adjuncts to psychotherapy for psychiatric conditions.

Where it fitsCited in the trauma/depression clinical-referral material (now the "Interlude: When PRE►LOΔD Isn't Enough" and Appendix B), supporting the book's referral guidance on emerging treatment options beyond its own scope.

What it isA randomized controlled trial in female rape victims with chronic PTSD finding cognitive processing therapy and prolonged exposure similarly effective, and both superior to a waitlist control.

Where it fitsTagged to an earlier chapter numbering plus "Clearing the Ground" (now the Interlude/Appendix B trauma-referral material), providing the evidence base for CPT as a recommended clinical treatment.

What it isThe definitive clinician's manual for Cognitive Processing Therapy (CPT), a leading evidence-based treatment protocol for PTSD.

Where it fitsCited in the trauma-informed clinical-referral material (Interlude / Appendix B), supporting the book's guidance on established, evidence-based PTSD treatments beyond self-help.

What it isA widely cited review summarizing evidence for mirror neurons — brain cells that fire both when performing an action and when observing someone else perform it — and their proposed role in action understanding and imitation.

Where it fitsCited among the Selected Sources supporting the book's mirror-neuron/social-cognition material on how humans automatically model and are shaped by the people around them. The book explicitly rests no practice on mirror neurons — in humans they are inferred from neuroimaging, never directly recorded. The behavioural phenomena the book does use (emotional contagion, behavioural synchrony) are real and measurable whatever their neural basis. See "What This Book Claims — and What It Does Not."

What it isA book by the co-discoverer of mirror neurons explaining the neuroscience of mirror neurons and their role in action understanding, empathy, and social cognition.

Where it fitsCited in Chapter 7 ("Your Environment Is Quietly Resetting Your Baseline"), supporting the book's discussion of social contagion and how we unconsciously mirror the emotional states and behaviors of those around us. The book explicitly rests no practice on mirror neurons — in humans they are inferred from neuroimaging, never directly recorded. The behavioural phenomena the book does use (emotional contagion, behavioural synchrony) are real and measurable whatever their neural basis. See "What This Book Claims — and What It Does Not."

What it isA popular self-help book introducing the "Let Them" mindset for reducing stress caused by trying to control other people's opinions and behavior.

Where it fitsCited in Chapter 11 ("Letting Go Without Giving Up"), directly paralleling the book's Sphere of Agency / "Transfer" concept of releasing control over what isn't yours.

What it isA Journal of Physiology commentary examining evidence that dopamine mediates exercise-induced improvements in cognition.

Where it fitsSupports the exercise-biology material, adding dopamine as a mechanism by which physical activity sharpens cognitive readiness.

What it isA classic 1963 experiment showing that when researchers were told rats were bred to be 'maze-bright' vs. 'maze-dull' (though actually random), the rats performed according to the experimenter's expectations, demonstrating experimenter-expectancy bias.

Where it fitsEstablishes the experimenter-expectancy effect underlying the Pygmalion/co-regulation themes of how one person's expectations shape another's performance, relevant to Chapter 10's discussion of unconsciously shaping those around us.

What it isLandmark study showing that when teachers were told certain randomly-selected students were expected to be 'intellectual bloomers,' those students showed greater IQ gains, demonstrating the self-fulfilling power of teacher expectations (the 'Pygmalion effect').

Where it fitsDirectly supports Chapter 11's Sphere of Agency and Chapter 10's theme of co-regulation, showing how our expectations of others measurably shape their outcomes.

Replication caveatThe size of this effect is contested, and "measurably shape their outcomes" states the strong reading. The original IQ gains were challenged on reanalysis by Elashoff and Snow, and later meta-analytic work finds teacher-expectancy effects that are real but modest and largely concentrated in the earliest school years. Take the direction of the effect from this study, not the magnitude of the 1968 gains.

What it isA foundational social-psychology chapter introducing what became known as the fundamental attribution error, describing systematic biases in how people explain others' behavior.

Where it fitsCited in Chapter 8 ("Unspoken Contracts Are Running Your Relationships"), underpinning the book's discussion of how unspoken relational assumptions arise from misattributing others' behavior to character rather than context.

What it isA 2014 PNAS study using a computational model to show that momentary happiness is driven not by current rewards but by the gap between expectations and outcomes (reward prediction errors), correlating with striatal brain activity.

Where it fitsCentral to Chapter 4's 'Gap vs. Gain' framework, providing neuroscientific evidence that momentary happiness — moment-to-moment feeling, sampled repeatedly during a risky-choice task, not life satisfaction — tracks the gap between expectation and outcome rather than absolute outcomes.

What it isA neuroimaging study showing that anticipating a musical "chill" moment and experiencing its emotional peak involve dopamine release in distinct brain regions.

Where it fitsCited in Appendix A, illustrating the neuroscience of anticipation versus reward that underlies the book's toolkit techniques for savoring and reward prediction.

What it isRobert Sapolsky's popular-science book explaining how chronic psychological stress in humans—unlike the acute, episodic stress zebras face—drives disease processes such as ulcers, heart disease, and depression.

Where it fitsFoundational stress-physiology text underlying the book's stress reappraisal and HRV material, tying to the Biological Pivot themes of Chapter 3.

What it isA theoretical review proposing that mind-wandering involves both perceptual decoupling from external input and often a lack of awareness that one's mind has wandered.

Where it fitsCited in Chapter 5 ("Train Your Brain to Find What It's Looking For"), supporting the book's discussion of attention, meta-awareness, and the mental discipline needed to build a savoring/gratitude aptitude.

What it isA comprehensive 2015 review of how dopamine neurons encode reward prediction errors that underlie learning and decision-making, translating reinforcement-learning theory into measurable neural signals.

Where it fitsProvides the neuroscience of reward/prediction-error signaling that underpins Chapter 4's explanation of why winning against expectation, not winning itself, drives feeling of reward.

What it isA book by the founder of Internal Family Systems (IFS) therapy explaining the model's view that the mind consists of multiple "parts," none inherently bad, healed through Self-led integration.

Where it fitsListed as a background/further-reading reference; its parts-based model complements the book's Emotional Ledger and self-compassion themes around treating internal reactions as information rather than enemies.

What it isA clinical guide to Mindfulness-Based Cognitive Therapy (MBCT), an eight-week program combining mindfulness practice with cognitive therapy to prevent depression relapse.

Where it fitsCited in the clinical-referral material ("Clearing the Ground," now the Interlude/Appendix B), supporting the book's guidance toward evidence-based treatment for readers whose depression needs more than self-help tools.

What it isNeuroscientist Anil Seth's 2021 book arguing that consciousness and perception are generated by the brain's constant predictions about the body and world, which are then corrected by sensory input ('controlled hallucination').

Where it fitsSupports the book's 'prediction-engine brain' framing, directly grounding Chapter 5's discussion of how the brain actively constructs what it perceives, including what it savors or notices.

What it isFrancine Shapiro's authoritative 3rd-edition manual on EMDR therapy, detailing its theoretical basis and the eight-phase protocol used to treat PTSD and other trauma-related conditions.

Where it fitsClinical reference supporting the trauma-informed referral material in the Interlude/Appendix B section for readers whose needs exceed self-help techniques.

What it isA foundational interpersonal neurobiology text arguing that mind and brain structure emerge through relational experience.

Where it fitsCited in Chapter 6 ("Your Feelings Are Data"), grounding the book's discussion of how relationships and early attachment shape the brain's emotional-processing architecture.

What it isA parenting guide presenting neuroscience-grounded strategies to help integrate a child's "upstairs" and "downstairs" brain.

Where it fitsCited in Chapter 6, supporting the book's discussion of emotional regulation and labeling as skills that can be taught and modeled, including to children.

What it isThe famous 'invisible gorilla' experiment showing that observers focused on counting basketball passes frequently fail to notice a person in a gorilla suit walking through the scene, demonstrating sustained inattentional blindness.

Where it fitsIllustrates how attention filters perception, supporting the book's prediction-engine-brain theme that we only notice what we're primed to look for, relevant to Chapter 5's savoring/noticing material.

What it isA theoretical paper showing that hyperbolic, rather than exponential, discounting of future rewards can arise rationally from uncertainty about future hazard rates.

Where it fitsCited in Chapter 3 ("Your Body Is Taking Orders From a Story"), supporting the book's argument that steeply discounting the future is a rational response to uncertainty about survival rather than a defect. Sozou's case is mathematical: the paper contains no brain data and no manipulation of perceived threat.

What it isA quantitative synthesis evaluating the treatment efficacy of Emotionally Focused Couple Therapy across multiple outcome studies.

Where it fitsCited in Chapter 6, intended to support claims about the effectiveness of emotion-focused approaches to relational and emotional repair discussed in the Emotional Ledger chapter.

What it isAn fMRI study showing that a speaker's and listener's brain activity become temporally coupled during successful verbal communication, with greater coupling predicting better comprehension.

Where it fitsCited in Chapter 11 ("Letting Go Without Giving Up"), supporting the book's discussion of neural synchrony and connection underlying effective communication and co-regulation.

What it isA theoretical paper proposing that EMDR's eye movements may engage REM-sleep-like neurobiological processes supporting memory reprocessing in PTSD treatment.

Where it fitsCited in the clinical-referral material and Appendix A, supporting the book's mention of EMDR as an evidence-informed trauma treatment option for readers who need more than self-guided tools.

What it isThe classic "pen-in-mouth" experiment showing that inhibiting or facilitating smiling muscles affects how funny people rate cartoons, supporting the facial feedback hypothesis.

Where it fitsCited in Chapter 6, illustrating the body-to-brain feedback loop relevant to the book's discussion of how physical states shape emotional experience and labeling.

Replication caveatThis specific pen-in-mouth result failed a large coordinated replication: Wagenmakers et al. (2016) ran it across 17 laboratories and found no effect. Facial feedback as a broader phenomenon survives but is modest — see the Coles, Larsen and Lench (2019) meta-analysis elsewhere in this bibliography, which concludes the effects are "small and variable." Cite the loop, not this experiment.

What it isA randomized controlled study finding that a 12-week yoga program improved mood and reduced anxiety more than walking, correlating with increased brain GABA levels measured via MRI spectroscopy.

Where it fitsSupports the book's HRV/exercise biology material: changes in thalamic GABA correlated with the mood and anxiety improvements, which suggests a GABAergic route from yoga to mood regulation without establishing one.

Design caveatThe mood and anxiety advantage of yoga over walking is a genuine randomized between-group result. The GABA finding is thinner: n = 34 across 12 weeks, and the acute rise in thalamic GABA in the yoga group was only near-significant (p = 0.09).

What it isDan Sullivan and Benjamin Hardy's 2021 book arguing that high achievers should measure progress against their past selves ('the Gain') rather than an ever-receding ideal ('the Gap') to sustain happiness and confidence.

Where it fitsDirectly names and underlies the central 'Gap vs. Gain' framework of Chapter 4, 'Why Winning Still Feels Empty.'

What it isA review of research on how child maltreatment disrupts development of the hypothalamic-pituitary-adrenal (stress hormone) axis.

Where it fitsCited in Chapter 3, supporting the book's biological explanation of how early adversity recalibrates the body's stress-response system.

What it isA theoretical paper proposing that the female stress response is better characterized as "tend-and-befriend," nurturing offspring and seeking social alliances, rather than solely fight-or-flight.

Where it fitsCited across chapters on unspoken relational contracts and co-regulation (Chapters 8 and 10), supporting the book's discussion of social bonding as a core biological stress-response strategy.

What it isNeuroscientist Jill Bolte Taylor's memoir recounting her own severe stroke and recovery, describing how the experience revealed the distinct functions and perspectives of the brain's left and right hemispheres.

Where it fitsIllustrative neuroscience narrative on brain hemisphere function and altered states of consciousness, relevant to the book's prediction-engine-brain and letting-go themes; cited among the Selected Sources for its account of consciousness and self.

Source caveatThe publisher's page for the 2008 Viking hardcover has been retired; the link goes to Penguin Random House's current page for the same book, which lists the later Penguin paperback (ISBN 9780452295544). Same text, same author, different printing.

What it isA randomized controlled trial showing MBCT significantly reduced relapse/recurrence risk in patients with three or more prior depressive episodes.

Where it fitsCited in the clinical-referral material (Interlude/Appendix B), supporting the book's referral guidance toward MBCT as an evidence-based option for recurrent depression.

What it isIntroduces the Posttraumatic Growth Inventory, a 21-item scale measuring positive psychological change following traumatic events across five domains.

Where it fitsListed as a background/further-reading reference, relevant to the book's themes of finding meaning and growth through adversity rather than merely returning to baseline after hardship.

What it isA foundational developmental-psychology book presenting findings from the New York Longitudinal Study on how innate temperament shapes children's development.

Where it fitsCited in Chapter 11, supporting the book's discussion of how inborn temperament interacts with environment and agency in shaping long-term outcomes.

Availability noteThis 1977 book has no publisher page to link to: Brunner/Mazel was absorbed into Routledge, whose catalogue does not carry the title. The edition is confirmed at the Wellcome Collection catalogue — Brunner/Mazel, New York, 1977, xv + 270 pp., ISBN 0876301391 — and in the contemporary review of it in Psychological Medicine.

What it isAn fMRI study showing that neural responses to potential losses and gains explain individual differences in behavioral loss aversion.

Where it fitsCited in material aligning with Chapter 9's themes (mapped to Chapter 4/6's Gap-vs-Gain and Emotional Ledger content), grounding the book's discussion of why losses feel more powerful than equivalent gains.

What it isThe original 1978 'Still Face' experiment showing that infants become distressed and withdraw when their mothers unexpectedly stop responding facially during interaction, revealing infants' sensitivity to relational feedback.

Where it fitsFoundational co-regulation research supporting Chapter 10's argument that our emotional responsiveness (or lack thereof) shapes the nervous systems of those around us, especially children.

What it isA theoretical paper proposing that psychological distance in time, space, social relation, or hypotheticality shapes how abstractly people mentally construe objects and events.

Where it fitsListed as a background/further-reading reference, relevant to the book's discussion of reframing and perspective-taking (viewing stressors from psychological distance) in the Biological Pivot chapters.

What it isThe landmark paper identifying representativeness, availability, and anchoring as heuristics that systematically bias human judgment under uncertainty.

Where it fitsCited in material from an earlier chapter numbering now folded into the book's Gap-vs-Gain and Emotional Ledger themes (Chapters 4/6), underpinning the book's discussion of predictable cognitive biases in judgment.

What it isThis paper refines prospect theory into "cumulative prospect theory," modeling decision-making under risk and uncertainty using cumulative weighting functions.

Where it fitsCited across chapters mapping to Gap-vs-Gain/Emotional Ledger themes and the book's epistemology section, supporting its discussion of loss aversion and how people weigh gains and losses asymmetrically.

What it isA large-scale study of over 500,000 U.S. adolescents finding that depressive symptoms and suicide-related outcomes rose sharply after 2010, correlating with increased use of smartphones and social media.

Where it fitsSupports Chapter 4 and Chapter 7's material on social contagion and how digital environments reset emotional/social comparison standards, paralleling the youth mental-health decline.

Scope caveatThese are population-level time trends, not a manipulation, so the relationship is parallel movement rather than demonstrated cause. Orben and Przybylski (2019) re-analysed the same datasets and found the association comparable in magnitude to trivial covariates.

What it isPhysiologist Kerstin Uvnäs Moberg's book for general readers explaining oxytocin's role in bonding, calm, and healing, positioning it as a counterbalance to stress hormones like adrenaline.

Where it fitsProvides the hormonal/biological basis for the book's relationship and co-regulation themes, complementing HRV and stress-reappraisal material.

What it isA systematic review with meta-analysis finding that physically active individuals tend to have longer telomeres than inactive controls.

Where it fitsConnects the exercise-biology and cellular-aging material, linking an active lifestyle to longer telomeres (paralleling the Epel study).

Scope caveatThe pooled comparisons are largely cross-sectional — active people measured against inactive people — so this supports an association between activity and telomere length, not a demonstrated effect of taking up exercise.

What it isBessel van der Kolk's influential book on how psychological trauma reshapes the brain and body, and how therapies beyond talk therapy (e.g., yoga, neurofeedback) can aid recovery.

Where it fitsCore clinical text for Chapter 6's 'Your Feelings Are Data'/Emotional Ledger material, grounding the book's trauma-informed approach to affect and bodily sensation.

What it isA 2013 study finding that the structure of music sung by choir members (e.g., phrasing and breathing patterns) directly influences singers' heart rate variability, linking musical structure to physiological synchronization.

Where it fitsSupports the book's HRV biology material, showing how structured breathing/singing practices can regulate the nervous system.

What it isA study finding that frequent Facebook use is associated with lower self-esteem, mediated by upward social comparison.

Where it fitsCited in Chapters 4 and 7, supporting the book's discussion of how social media resets personal standards and fuels Gap-vs-Gain comparison thinking.

What it isA former FBI hostage negotiator's popular guide to tactical-empathy-based negotiation techniques for business and personal life.

Where it fitsListed as a background/further-reading reference, relevant to the book's material on the "conversation before the conversation" and navigating unspoken relational expectations.

Availability noteNo live publisher page for this title could be verified, so the citation is given without a link. The book is confirmed at the Library of Congress (LCCN 2016020809): Harper Business, 17 May 2016, ISBN 9780062407801.

What it isA controlled study finding that spiritual meditation produced greater reductions in anxiety and greater pain tolerance than secular meditation or plain relaxation, suggesting spirituality enhances meditation's benefits.

Where it fitsSupports Appendix A's toolkit material on meditation practices, particularly the book's inclusion of spiritual/multi-faith framing for contemplative techniques.

What it isDrawing on the Harvard Study of Adult Development, the authors argue that strong relationships are the primary driver of long-term happiness and health.

Where it fitsCited in material mapping to the book's relationship and co-regulation themes (Chapters 8-10), supporting its argument that relationship quality, not achievement, predicts long-term wellbeing.

What it isSleep scientist Matthew Walker's book synthesizing research on why sleep is essential, and the wide-ranging cognitive, emotional, and physical harms of chronic sleep deprivation.

Where it fitsAccessible overview of sleep biology behind the book's implementation/Daily Pattern section and Appendix A's toolkit; the primary sources cited alongside it, such as Xie et al. (2013), carry the sleep-hygiene claims.

Source caveatA popular synthesis, not primary literature, and one with a well-documented record of factual errors and overstated claims about the research it summarises.

What it isA clinical reference text detailing the theory and practice of Interpersonal Psychotherapy (IPT) for depression and other disorders.

Where it fitsCited in the clinical-referral material (Interlude/Appendix B), supporting the book's guidance toward evidence-based talk-therapy options for relational and mood difficulties beyond self-help.

What it isThe foundational text of narrative therapy, arguing that therapy works by helping people re-story their lived experience.

Where it fitsCited in Chapter 9 ("The Conversation Before the Conversation") and the clinical-referral material, underpinning the book's narrative-reframing approach to relational conflict.

What it isMichael White's guide to core narrative therapy techniques, including re-authoring and externalizing conversations.

Where it fitsCited in Chapter 4 and the clinical-referral material, supporting the book's discussion of reframing personal narrative as a therapeutic tool for changing the internal "story" driving stress responses.

What it isA survey of 151 workplace leader–follower dyads finding that leaders' more positive implicit beliefs about followers went with higher performance expectations and better-rated follower performance — a correlational model of "naturally occurring" Pygmalion effects.

Where it fitsCited in Chapter 10 ("How You Are Already Shaping Everyone Around You"), supporting the book's discussion of Pygmalion effects and how our expectations of others shape their outcomes. The causal direction here is inferred from the model, not tested.

Design caveatNothing was manipulated and nobody was randomly assigned, so this study measured associations at a single point in time. The causal claims in the Pygmalion literature rest on the experimental studies, not on this one.

What it isAn experiment showing that harboring grudges produced more aversive emotion and higher physiological arousal (EMG, skin conductance, heart rate, blood pressure) than imagining forgiveness.

Where it fitsGrounds the forgiveness / 'letting go' material (Sphere of Agency, the Transfer), showing unforgiveness carries a measurable physiological cost.

What it isA research-based clinical text on the psychology of forgiveness and how clinicians can help promote forgiveness and reconciliation.

Where it fitsCited in Chapter 10, supporting the book's discussion of forgiveness as part of co-regulation and repairing relational rupture.

What it isA 2013 Science study in mice showing that the brain's glymphatic system clears metabolic waste products significantly faster during sleep than wakefulness, via expansion of interstitial space.

Where it fitsProvides the biological mechanism for why sleep is restorative, supporting the book's sleep/biology material underlying its habit-formation and implementation guidance.

What it isA neuroimaging study finding that a brief head-out cold-water immersion produced measurable increases in positive affect and alertness alongside stronger coupling between large-scale brain networks.

Where it fitsSupports the cold-exposure entry in the Pivot toolkit and Appendix E (The Biology Beneath the Four Dimensions), offering a first, exploratory neural correlate for the self-reported lift in alertness and mood after a brief cold immersion.

Design caveatA single five-minute immersion, and the authors call the work exploratory: the positive-affect result came from a focal effect confined to a few network connections. Treat the imaging as a candidate correlate, not a settled mechanism.

What it isThe 1908 experiment with Japanese dancing mice from which the "Yerkes-Dodson Law" was later derived: the shock strength that produced fastest learning of a brightness discrimination depended on task difficulty, with harder discriminations learned best under weaker stimulation.

Where it fitsCited in Chapter 3 ("Your Body Is Taking Orders From a Story") as the provenance of the optimal-stress curve. The smooth inverted-U from arousal to performance is a mid-twentieth-century reinterpretation — arousal theory did not exist in 1908 and the paper does not use the concept — so the book's claims about human performance under stress rest on modern human sources, not on this one.

What it isA clinical guide introducing schema therapy, an integrative treatment combining cognitive-behavioral, experiential, and relational techniques for chronic psychological patterns.

Where it fitsCited in the clinical-referral material (Interlude/Appendix B), supporting the book's guidance toward evidence-based treatment for deep-rooted patterns beyond the book's own self-help scope.

What it isA study finding that both physical strength training and purely mental/imagined maximal contractions produced measurable strength gains, supporting a neural origin for early strength increases.

Where it fitsCited in Appendix A, supporting the toolkit's discussion of mental rehearsal and visualization as legitimate neurologically grounded techniques.

What it isA landmark NIMH randomized controlled trial showing a single IV dose of an NMDA-receptor antagonist (ketamine) produced rapid antidepressant effects in patients with treatment-resistant major depression.

Where it fitsCited in the clinical-referral material (Interlude/Appendix B), supporting the book's mention of emerging pharmacological options for depression that falls outside self-help's reach.

What it isBluma Zeigarnik's original 1927 doctoral research (under Kurt Lewin) demonstrating that people remember interrupted, unfinished tasks nearly twice as well as completed ones—the basis of the 'Zeigarnik effect.' The linked PDF is the abridged English translation, "On finished and unfinished tasks," from Ellis's A Source Book of Gestalt Psychology; the German original named in the citation runs 85 pages.

Where it fitsUnderlies Chapter 10's material on unfinished business and psychological tension, relevant to how unresolved matters continue to occupy mental bandwidth until addressed or released.

Replication caveatSplit verdict, and the distinction matters here. The Ghibellini and Meier (2025) meta-analysis elsewhere in this bibliography found no consistent memory advantage for interrupted tasks — the "remember them twice as well" claim does not replicate. What did hold up is the related Ovsiankina effect: a reliable pull to resume what was left unfinished. Chapter 10's argument rests on the resumption pull, which survives; it should not lean on the memory finding.

What it isA systematic review and meta-analysis of RCTs finding that aerobic exercise significantly reduces inflammatory markers (notably IL-6) in healthy middle-aged and older adults.

Where it fitsSupports the exercise-biology material on how physical activity lowers systemic inflammation, a lever in the 'Biological Pivot.'

What it isA study of men immersed in water at different temperatures for one hour, finding distinct hormonal and cardiovascular responses depending on water temperature, including reduced cortisol and heart rate in warm/cool immersion and sympathetic activation in cold.

Where it fitsProvides the physiological evidence base for the cold-exposure material, showing that water temperature drives distinct autonomic and hormonal responses. The book's HRV claims rest on the studies that measured heart-rate variability, such as Vickhoff et al. (2013); this one measured heart rate and blood pressure.

Design caveatOne-hour immersions in a small group of young men, so the autonomic and hormonal findings should not carry more weight than that.