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The bibliography is the backbone

Priority order: systematic reviews and meta-analyses, longitudinal work, controlled studies, large observational studies, clinical studies, cross-sectional work, case series, case reports, expert perspectives, commentary. Opinion may raise questions. It does not close them.

43 records · commentary is never treated as scientific evidence even when shown.

  • 2022umbrella reviewStrong evidence

    Social media use and its impact on adolescent mental health: An umbrella review of the evidence

    Valkenburg, P. M., Meier, A. & Beyens, I. · Current Opinion in Psychology

    Sample
    Not stated here · Adolescents
    Platform / condition
    general-social-media · depression, anxiety, general-mental-health
    Major findings
    Umbrella review finds predominantly small associations, substantial heterogeneity, and a literature still unable to support uniform harmful or uniform beneficial conclusions.
    Limitations
    Depends on quality of included reviews; little evidence on algorithms or self-diagnosis specifically.
    Relevance to this project
    Best available synthesis of social-media/mental-health reviews as of the early 2020s.

    doi:10.1016/j.copsyc.2021.08.017

  • 2021meta analysisStrong evidence

    Global prevalence of depressive and anxiety symptoms in children and adolescents during COVID-19: a meta-analysis

    Racine, N. et al. · JAMA Pediatrics

    Sample
    29 samples; ~80,000 youth · Children and adolescents
    Platform / condition
    not-platform-specific · depression, anxiety
    Major findings
    Pooled prevalence of clinically elevated depression and anxiety symptoms during COVID-19 was substantially higher than pre-pandemic estimates, with older adolescents and girls more affected in many samples.
    Limitations
    Symptom scales ≠ diagnoses; pandemic studies were opportunistic; cannot attribute the rise to social media.
    Relevance to this project
    COVID-era distress increased. That fact is a confounder for any social-media-only explanation of 2020–2022 clinical surges.

    doi:10.1001/jamapediatrics.2021.2482

  • 2020narrative reviewStrong evidence

    Annual Research Review: Adolescent mental health in the digital age: facts, fears, and future directions

    Odgers, C. L. & Jensen, M. R. · Journal of Child Psychology and Psychiatry

    Sample
    Not stated here · Adolescents
    Platform / condition
    general-social-media · depression, anxiety, general-mental-health
    Major findings
    Reviews evidence that most associations between digital technology use and adolescent mental health are small, mixed, and poorly suited to strong causal claims. Calls for better designs, attention to individual differences, and less moral panic.
    Limitations
    Narrative review; literature itself is dominated by cross-sectional self-report.
    Relevance to this project
    Sets the scientific baseline: fear of social media has often outrun the quality of available evidence.

    doi:10.1111/jcpp.13190

  • 2020systematic reviewAssociation

    A systematic review: the influence of social media on depression, anxiety and psychological distress in adolescents

    Keles, B., McCrae, N. & Grealish, A. · International Journal of Adolescence and Youth

    Sample
    Not stated here · Adolescents
    Platform / condition
    general-social-media · depression, anxiety
    Major findings
    Most included studies reported positive associations between social-media use and depression, anxiety, or distress, but were largely cross-sectional with heterogeneous measures.
    Limitations
    Cannot support causation; quality of included studies is limited.
    Relevance to this project
    Shows how easy it is to summarise a literature as “harmful” when designs cannot bear that inference.

    doi:10.1080/02673843.2019.1590851

  • 2019systematic reviewModerate evidence

    Young people’s online help-seeking and mental health difficulties: systematic narrative review

    Pretorius, C., Chambers, D. & Coyle, D. · Journal of Medical Internet Research

    Sample
    Not stated here · Young people
    Platform / condition
    search, general-social-media, forums · general-mental-health
    Major findings
    Young people use the internet to understand symptoms, decide whether they have a problem, and find informal or professional help. Anonymity and accessibility are facilitators; quality and overwhelm are barriers.
    Limitations
    Help-seeking studies rarely include clinical confirmation of self-identified problems.
    Relevance to this project
    Key evidence that online information is already part of the help-seeking pathway.

    doi:10.2196/13873

  • 2017systematic reviewModerate evidence

    A systematic review of the relationship between internet use, self-harm and suicidal behaviour in young people: The good, the bad and the unknown

    Marchant, A. et al. · PLOS ONE

    Sample
    Not stated here · Young people
    Platform / condition
    forums, general-social-media · self-harm
    Major findings
    Internet use related to self-harm shows both harmful pathways (normalization, reinforcement, contagion of methods) and potentially helpful ones (support, crisis help). Evidence quality is mixed.
    Limitations
    Heterogeneous designs; ethical constraints on experiments.
    Relevance to this project
    Self-harm is a condition where dual effects of online communities are unusually well documented.

    doi:10.1371/journal.pone.0181722

  • 2016systematic reviewModerate evidence

    A systematic review of the impact of the use of social networking sites on body image and disordered eating outcomes

    Holland, G. & Tiggemann, M. · Body Image

    Sample
    Not stated here · Mostly adolescent and young-adult females
    Platform / condition
    facebook, instagram, general-social-media · eating-disorders
    Major findings
    Use of social networking sites, especially appearance-focused use, is associated with body-image concerns and disordered eating; experimental evidence is stronger for comparison/appearance mechanisms than for total time.
    Limitations
    Causation still incomplete; platform mix dated relative to TikTok.
    Relevance to this project
    Among the better-evidenced content-specific pathways: appearance comparison, not generic “social media”.

    doi:10.1016/j.bodyim.2016.02.008

  • 2012meta analysisContested

    Evaluation of the evidence for the trauma and fantasy models of dissociation

    Dalenberg, C. J. et al. · Psychological Bulletin

    Sample
    Not stated here
    Platform / condition
    not-platform-specific · did, ptsd
    Major findings
    Argues that the evidence better supports a trauma model of dissociation than a pure fantasy/sociocognitive model, while acknowledging complexity.
    Limitations
    Does not address TikTok-era self-identification; measurement of dissociation is disputed.
    Relevance to this project
    Represents the traumagenic side of a still-active scientific controversy.

    doi:10.1037/a0027447

  • 2010systematic reviewStrong evidence

    Perceived barriers and facilitators to mental health help-seeking in young people: a systematic review

    Gulliver, A., Griffiths, K. M. & Christensen, H. · BMC Psychiatry

    Sample
    Not stated here · Young people
    Platform / condition
    not-platform-specific · general-mental-health
    Major findings
    Stigma, embarrassment, poor mental-health literacy, and preference for self-reliance are consistent barriers; positive past experiences and social support facilitate help-seeking.
    Limitations
    Pre-TikTok literature; still highly relevant to access and destigmatization hypotheses.
    Relevance to this project
    Explains why self-diagnosis can be a response to inaccessible or stigmatized care.

    doi:10.1186/1471-244X-10-113

  • 2020longitudinalModerate evidence

    Does time spent using social media impact mental health?: An eight year longitudinal study

    Coyne, S. M., Rogers, A. A., Zurcher, J. D., Stockdale, L. & Booth, M. · Computers in Human Behavior

    Sample
    Not stated here · Adolescents followed into young adulthood
    Platform / condition
    general-social-media · depression, anxiety
    Major findings
    Eight-year longitudinal data did not show that within-person increases in time on social media were associated with later increases in depression or anxiety.
    Limitations
    Time-use measure rather than content or recommendation exposure; U.S. sample.
    Relevance to this project
    Time-on-site is a poor proxy for the pathways this project investigates.

    doi:10.1016/j.chb.2019.106160

  • 2020experience samplingModerate evidence

    The effect of social media on well-being differs from adolescent to adolescent

    Beyens, I., Pouwels, J. L., van Driel, I. I., Keijsers, L. & Valkenburg, P. M. · Scientific Reports

    Sample
    387 adolescents · Adolescents
    Platform / condition
    instagram, general-social-media · general-mental-health
    Major findings
    Person-specific analyses showed that social-media effects on well-being ranged from negative to positive to null. Average effects concealed this heterogeneity.
    Limitations
    Short-term well-being, not psychiatric diagnosis or self-labelling; WhatsApp included among platforms.
    Relevance to this project
    Average effects are the wrong unit of analysis for the questions this site asks.

    doi:10.1038/s41598-020-67727-7

  • 2019longitudinalModerate evidence

    The longitudinal association between social-media use and depressive symptoms among adolescents and young adults: An empirical reply to Twenge et al. (2018)

    Heffer, T., Good, M., Daly, O., MacDonell, E. & Willoughby, T. · Clinical Psychological Science

    Sample
    Not stated here · Adolescents and young adults
    Platform / condition
    general-social-media · depression
    Major findings
    Longitudinal analyses found little evidence that social-media use predicted later depressive symptoms; some evidence that depressive symptoms predicted later social-media use, consistent with reverse causation.
    Limitations
    Self-report; specific cohorts; does not test content type or algorithms.
    Relevance to this project
    Directly illustrates reverse causation as a live alternative to “social media → depression”.

    doi:10.1177/2167702618812727

  • 2019longitudinalAssociation

    Associations between time spent using social media and internalizing and externalizing problems among US youth

    Riehm, K. E. et al. · JAMA Psychiatry

    Sample
    Not stated here · U.S. adolescents
    Platform / condition
    general-social-media · depression, anxiety
    Major findings
    Greater social-media time was associated with internalizing (and some externalizing) problems in a nationally relevant longitudinal sample, after some covariate adjustment.
    Limitations
    Residual confounding likely; time-use rather than content; not diagnostic outcomes.
    Relevance to this project
    A frequently cited longitudinal association—still not a mechanism study.

    doi:10.1001/jamapsychiatry.2019.2325

  • 2019longitudinalEmerging

    Effects of exposure to self-harm on social media: Evidence from a two-wave panel study among young adults

    Arendt, F., Scherr, S. & Romer, D. · New Media & Society

    Sample
    Not stated here · Young adults
    Platform / condition
    general-social-media, instagram · self-harm
    Major findings
    Panel data suggested that exposure to self-harm content was associated with later self-harm ideation/behaviour after prior levels were considered, consistent with a social-learning concern—while not proving a simple contagion model.
    Limitations
    Self-report; young adults not younger adolescents; residual confounding.
    Relevance to this project
    Rare longitudinal evidence on content exposure rather than mere time-use.

    doi:10.1177/1461444819850106

  • 2022longitudinalModerate evidence

    Windows of developmental sensitivity to social media

    Orben, A., Przybylski, A. K., Blakemore, S.-J. & Kievit, R. A. · Nature Communications

    Sample
    Not stated here · Adolescents, with sex-stratified windows
    Platform / condition
    general-social-media · general-mental-health
    Major findings
    Identified developmental windows in which the association between social-media use and life satisfaction was somewhat stronger, with different timing for girls and boys.
    Limitations
    Life satisfaction is not clinical diagnosis; still associational; UK datasets.
    Relevance to this project
    Adolescence is not a uniform exposure period. Developmental timing matters.

    doi:10.1038/s41467-022-29296-3

  • 2021longitudinalModerate evidence

    There is no evidence that associations between adolescents’ digital technology engagement and mental health problems have increased

    Vuorre, M., Orben, A. & Przybylski, A. K. · Clinical Psychological Science

    Sample
    Not stated here · Adolescents
    Platform / condition
    general-social-media · depression, general-mental-health
    Major findings
    Analyses of large datasets found no compelling evidence that the association between technology engagement and mental-health problems had strengthened over time.
    Limitations
    Still associational; coarse technology measures.
    Relevance to this project
    Challenges the claim that social media has become progressively more pathogenic as platforms evolved.

    doi:10.1177/2167702621994549

  • 2021cross sectionalModerate evidence

    Trends in public stigma of mental illness in the US, 1996–2018

    Pescosolido, B. A., Halpern-Manners, A., Luo, L. & Perry, B. · JAMA Network Open

    Sample
    Not stated here
    Platform / condition
    not-platform-specific · depression, general-mental-health
    Major findings
    U.S. public stigma showed mixed change: some improvement in attitudes toward depression, less consistent change for other conditions; social-distance preferences remained substantial.
    Limitations
    Vignette-based public opinion, not online community behaviour.
    Relevance to this project
    Destigmatization is real but uneven—and cannot by itself explain condition-specific online surges.

    doi:10.1001/jamanetworkopen.2021.40202

  • 2021cross sectionalModerate evidence

    The echo chamber effect on social media

    Cinelli, M. et al. · Proceedings of the National Academy of Sciences

    Sample
    Not stated here
    Platform / condition
    facebook, twitter-x, reddit, multiple · general-mental-health
    Major findings
    Quantifies homophily and echo-chamber structure across platforms, finding platform-dependent segregation in information ecosystems.
    Limitations
    Political/news content, not mental-health communities; structure ≠ psychological effect.
    Relevance to this project
    Shows that some platforms cluster users with similar content; extending this to psychiatric identity is an inference, not a finding.

    doi:10.1073/pnas.2023301118

  • 2019specification curveStrong evidence

    The association between adolescent well-being and digital technology use

    Orben, A. & Przybylski, A. K. · Nature Human Behaviour

    Sample
    Three large-scale social datasets · Adolescents
    Platform / condition
    general-social-media · general-mental-health
    Major findings
    Across thousands of analytic specifications, associations between digital technology use and adolescent well-being were small—typically explaining well under 1% of variation—and sensitive to analytical choices.
    Limitations
    Observational; self-report; cannot establish causation; well-being measures are not clinical diagnoses.
    Relevance to this project
    A methodological benchmark showing that crude screen-time associations are weak and specification-dependent. Does not directly test self-diagnosis or identity pathways.

    doi:10.1038/s41562-018-0506-1

  • 2018cross sectionalAssociation

    Increases in depressive symptoms, suicide-related outcomes, and suicide rates among U.S. adolescents after 2010 and links to increased new media screen time

    Twenge, J. M., Joiner, T. E., Rogers, M. L. & Martin, G. N. · Clinical Psychological Science

    Sample
    Not stated here · U.S. adolescents
    Platform / condition
    general-social-media · depression, self-harm
    Major findings
    Documents a rise in adolescent depressive symptoms and suicide-related outcomes after 2010 and reports associations with new-media screen time. Interprets the temporal coincidence with smartphone adoption as suggestive.
    Limitations
    Largely between-person and ecological; cannot isolate social media from other cohort changes; has been challenged on design and confounding.
    Relevance to this project
    A central paper in the “smartphones caused the adolescent mental-health crisis” debate—important as a hypothesis-generating ecological argument, not as causal proof.

    doi:10.1177/2167702617723376

  • 2009content analysisModerate evidence

    Cyberchondria: Studies of the escalation of medical concerns in web search

    White, R. W. & Horvitz, E. · ACM Transactions on Information Systems

    Sample
    Not stated here
    Platform / condition
    search · general-mental-health
    Major findings
    Log analyses showed that web search can escalate medical concern: ambiguous symptoms lead to queries about serious disease, which can increase anxiety and further searching.
    Limitations
    Search, not TikTok; health anxiety analogue rather than psychiatric self-diagnosis per se.
    Relevance to this project
    A documented information-escalation mechanism that recommendation systems could in principle recapitulate.

    doi:10.1145/1629096.1629101

  • 2022clinical seriesClinical observation

    Stop that! It's not Tourette's but a new type of mass sociogenic illness

    Müller-Vahl, K. R., Pisarenko, A., Jakubovski, E. & Fremer, C. · Brain

    Sample
    Not stated here · Adolescents and young adults, predominantly female
    Platform / condition
    youtube, tiktok · functional-tics, tics-tourette
    Major findings
    Describes a rise in functional tic-like behaviours phenomenologically distinct from classic Tourette syndrome, temporally associated with popular Tourette-related social-media content, and interprets the phenomenon as a contemporary sociogenic presentation.
    Limitations
    Clinical observation and case material cannot establish population incidence or exclusive social-media causation; alternative stressors (including the pandemic) co-occurred.
    Relevance to this project
    The most-cited clinical argument that socially mediated functional symptoms can resemble a neurodevelopmental disorder without being that disorder.

    doi:10.1093/brain/awab316

  • 2021clinical seriesCase series

    Rapid onset functional tic-like behaviors in young females during the COVID-19 pandemic

    Pringsheim, T., Ganos, C., McGuire, J. F. et al. · Movement Disorders

    Sample
    Not stated here · Young females
    Platform / condition
    tiktok, general-social-media · functional-tics
    Major findings
    Multiple movement-disorder centres reported a surge of rapid-onset, complex, often coprolalic or explosive tic-like behaviours in adolescent females during the pandemic, differing from typical Tourette phenomenology and course.
    Limitations
    Case series; referral bias; pandemic confound; social-media exposure often reported, not experimentally manipulated.
    Relevance to this project
    Independent clinical replication of an unusual presentation, not a proof of a single cause.

    doi:10.1002/mds.28778

  • 2021clinical seriesClinical observation

    COVID-19 related increase in childhood tics and tic-like attacks

    Heyman, I., Liang, H. & Hedderly, T. · Archives of Disease in Childhood

    Sample
    Not stated here · Children and adolescents
    Platform / condition
    general-social-media · tics-tourette, functional-tics
    Major findings
    Reports a clinical increase in tics and tic-like attacks during COVID-19, including explosive functional-like presentations, with discussion of anxiety, deprivation, and media exposure as candidate contributors.
    Limitations
    Commentary/clinical report; cannot partition causes.
    Relevance to this project
    Documents the phenomenon while keeping pandemic stress on the table.

    doi:10.1136/archdischild-2021-321748

  • 2018narrative reviewEstablished

    Current concepts in diagnosis and treatment of functional neurological disorders

    Espay, A. J. et al. · JAMA Neurology

    Sample
    Not stated here
    Platform / condition
    not-platform-specific · functional-neurological
    Major findings
    Summarizes rule-in diagnosis of functional neurological disorder, emphasizing that symptoms are genuine, not feigned, and arise through mechanisms distinct from the diseases they may resemble.
    Limitations
    Not about social media.
    Relevance to this project
    The conceptual foundation for not collapsing functional symptoms into malingering.

    doi:10.1001/jamaneurol.2018.1264

  • 2016qualitativeClinical observation

    Exploring the experience of self-diagnosis of autism spectrum disorder in adults

    Lewis, L. F. · Archives of Psychiatric Nursing

    Sample
    Not stated here · Adults
    Platform / condition
    not-platform-specific · autism
    Major findings
    Qualitative accounts of adult autism self-diagnosis describe recognition, relief, and identity reconstruction, often after barriers to formal assessment. Self-diagnosis was typically a meaning-making process, not a casual label.
    Limitations
    Small qualitative sample; cannot estimate accuracy or prevalence.
    Relevance to this project
    Shows why self-identification can be a rational response to access barriers and missed clinical recognition, especially in adults.

    doi:10.1016/j.apnu.2016.03.009

  • 2022content analysisModerate evidence

    TikTok and attention-deficit/hyperactivity disorder: A cross-sectional study of social media content quality

    Yeung, A., Ng, E. & Abi-Jaoude, E. · The Canadian Journal of Psychiatry

    Sample
    100 most popular ADHD TikTok videos · Content analysis (not a clinical sample)
    Platform / condition
    tiktok · adhd
    Major findings
    A large share of highly viewed ADHD TikTok videos were classified as misleading when judged against clinical guidelines; anecdotal content was common and healthcare professionals were a minority of creators.
    Limitations
    Accuracy of videos is not the same as effects on viewers; coding depends on guideline interpretation; platform ranking changes.
    Relevance to this project
    Strong evidence that high-reach diagnostic content can be inaccurate. Does not by itself show that viewers self-diagnose or that diagnoses are wrong.

    doi:10.1177/07067437221082854

  • 2021content analysisEmerging

    TikTok tics: A pandemic within a pandemic

    Olvera, C., Stebbins, G. T., Goetz, C. G. & Kompoliti, K. · Movement Disorders Clinical Practice

    Sample
    Not stated here
    Platform / condition
    tiktok · functional-tics, tics-tourette
    Major findings
    Analyses of popular TikTok tic content found presentations that often diverged from classic Tourette phenomenology (abrupt severe coprophenomena, long complex sequences, atypical demographics).
    Limitations
    Content is not patients; viewers and creators are not a defined clinical cohort.
    Relevance to this project
    Shows that the information environment contained atypical models of “tics”.

    doi:10.1002/mdc3.13316

  • 2021case reportCase series

    Tics and TikTok: Functional tics spread through social media

    Hull, M. & Parnes, M. · Movement Disorders Clinical Practice

    Sample
    Not stated here · Adolescent females
    Platform / condition
    tiktok · functional-tics
    Major findings
    Clinical descriptions of functional tic-like behaviours in youth with substantial TikTok tic-content exposure, with symptoms overlapping those displayed by popular creators.
    Limitations
    Small clinical sample; exposure is retrospective and unquantified.
    Relevance to this project
    Supports face validity of a modelling pathway without proving population-level contagion.

    doi:10.1002/mdc3.13267

  • 2023theoreticalMechanistically plausible

    Are mental health awareness efforts contributing to the rise in reported mental health problems? A call to test the prevalence inflation hypothesis

    Foulkes, L. & Andrews, J. L. · New Ideas in Psychology

    Sample
    Not stated here
    Platform / condition
    general-social-media · general-mental-health
    Major findings
    Proposes that awareness campaigns and expanded mental-health discourse may increase reporting and some genuine problems via interpretative and looping effects (prevalence inflation), not only uncover previously hidden illness.
    Limitations
    Hypothesis paper; empirical tests remain limited.
    Relevance to this project
    A core competing explanation for rising identification: awareness can change interpretation, not only detection.

    doi:10.1016/j.newideapsych.2023.101010

  • 2023narrative reviewModerate evidence

    Understanding social media recommendation algorithms

    Narayanan, A. · Knight First Amendment Institute

    Sample
    Not stated here
    Platform / condition
    tiktok, youtube, facebook, twitter-x · general-mental-health
    Major findings
    Explains engagement-based ranking, how optimization for predicted engagement can create feedback loops, and why “the algorithm” is often a mix of user choices, creator incentives, and model objectives.
    Limitations
    Not a mental-health study; limited access to proprietary models.
    Relevance to this project
    Best public primer on mechanisms that could amplify mental-health content without proving that they do, or that amplification changes self-concept.

    https://knightcolumbia.org/content/understanding-social-media-recommendation-algorithms

  • 2020narrative reviewModerate evidence

    The effects of social deprivation on adolescent development and mental health

    Orben, A., Tomova, L. & Blakemore, S.-J. · The Lancet Child & Adolescent Health

    Sample
    Not stated here · Adolescents
    Platform / condition
    not-platform-specific · general-mental-health
    Major findings
    Reviews why peer interaction is developmentally salient in adolescence and how COVID-era social deprivation could affect mental health—while noting that digital communication may partly buffer isolation.
    Limitations
    Written early in the pandemic; not a test of social-media content effects.
    Relevance to this project
    Frames COVID as a disruption of peer ecology, not only as a screen-time shock.

    doi:10.1016/S2352-4642(20)30186-3

  • 2020narrative reviewModerate evidence

    Social media and mental health: benefits, risks, and opportunities for research and practice

    Naslund, J. A., Bondre, A., Torous, J. & Aschbrenner, K. A. · Journal of Technology in Behavioral Science

    Sample
    Not stated here
    Platform / condition
    general-social-media · general-mental-health
    Major findings
    Balances potential benefits (connection, stigma reduction, help-seeking) against risks (misinformation, social comparison, harmful content) and maps research opportunities.
    Limitations
    Broad review; mixed primary-study quality.
    Relevance to this project
    Supports a dual-pathway framing rather than a single harm story.

    doi:10.1007/s41347-020-00134-x

  • 2018theoreticalMechanistically plausible

    Transformation of adolescent peer relations in the social media context: Part 1—A theoretical framework and overview of empirical findings

    Nesi, J., Choukas-Bradley, S. & Prinstein, M. J. · Clinical Child and Family Psychology Review

    Sample
    Not stated here · Adolescents
    Platform / condition
    general-social-media · general-mental-health
    Major findings
    Argues that social media transforms peer relations along dimensions such as asynchronicity, permanence, publicness, cue absence, quantifiability, and visualness—changing the ecology of adolescent social life rather than merely adding screen time.
    Limitations
    Framework paper; not a causal test.
    Relevance to this project
    Provides the conceptual language for why likes, audiences, and recommendation may matter more than minutes online.

    doi:10.1007/s10567-018-0261-x

  • 2016theoreticalModerate evidence

    Concept creep: Psychology’s expanding concepts of harm and pathology

    Haslam, N. · Psychological Inquiry

    Sample
    Not stated here
    Platform / condition
    not-platform-specific · general-mental-health
    Major findings
    Documents vertical and horizontal expansion of harm-related concepts (abuse, bullying, trauma, mental disorder), with mixed implications for recognition versus over-inclusiveness.
    Limitations
    Conceptual analysis, not an epidemiological test of social media.
    Relevance to this project
    Diagnostic language can expand independently of platform algorithms.

    doi:10.1080/1047840X.2016.1082418

  • 2016narrative reviewModerate evidence

    The future of mental health care: peer-to-peer support and social media

    Naslund, J. A., Aschbrenner, K. A., Marsch, L. A. & Bartels, S. J. · Epidemiology and Psychiatric Sciences

    Sample
    Not stated here
    Platform / condition
    general-social-media · general-mental-health
    Major findings
    Reviews how online peer support can reduce isolation, offer experiential knowledge, and complement clinical care, while noting risks of misinformation and lack of moderation.
    Limitations
    Not a quantitative synthesis of outcomes.
    Relevance to this project
    Primary citation for the benefit pathway: communities can support, not only reinforce symptoms.

    doi:10.1017/S2045796015001067

  • 2014narrative reviewModerate evidence

    Depression and social identity: An integrative review

    Cruwys, T., Haslam, S. A., Dingle, G. A., Haslam, C. & Jetten, J. · Personality and Social Psychology Review

    Sample
    Not stated here
    Platform / condition
    not-platform-specific · depression
    Major findings
    Social identity can protect mental health (“social cure”) or, in some conditions, maintain symptoms when a valued group identity is organized around illness.
    Limitations
    Mostly offline groups; mixed causal evidence.
    Relevance to this project
    Community membership is not automatically harmful or helpful—it depends on identity content and norms.

    doi:10.1177/1088868314523839

  • 2014narrative reviewStrong evidence

    Is adolescence a sensitive period for sociocultural processing?

    Blakemore, S.-J. & Mills, K. L. · Annual Review of Psychology

    Sample
    Not stated here · Adolescents
    Platform / condition
    not-platform-specific · general-mental-health
    Major findings
    Reviews evidence that adolescence involves heightened sensitivity to social evaluation, peer influence, and identity-relevant cues, grounded in ongoing brain development.
    Limitations
    Does not measure social media.
    Relevance to this project
    Why adolescents may be more susceptible to social reinforcement and identity cues than other age groups—if such effects exist.

    doi:10.1146/annurev-psych-010213-115202

  • 2012narrative reviewContested

    Dissociation and dissociative disorders: Challenging conventional wisdom

    Lynn, S. J., Lilienfeld, S. O., Merckelbach, H., Giesbrecht, T. & van der Kloet, D. · Current Directions in Psychological Science

    Sample
    Not stated here
    Platform / condition
    not-platform-specific · did
    Major findings
    Summarizes sociocognitive and sleep-related accounts of dissociative phenomena, questioning trauma-necessity claims and highlighting iatrogenic and cultural shaping of DID presentations.
    Limitations
    Review/position; opponents argue it underweights trauma evidence.
    Relevance to this project
    The sociocognitive pole of the DID debate—relevant to social-learning hypotheses, not proof of online fabrication.

    doi:10.1177/0963721411429452

  • 2010theoreticalModerate evidence

    The impact of illness identity on recovery from severe mental illness

    Yanos, P. T., Roe, D. & Lysaker, P. H. · American Journal of Psychiatric Rehabilitation

    Sample
    Not stated here
    Platform / condition
    not-platform-specific · general-mental-health
    Major findings
    Develops illness identity as a construct: how far a diagnosis becomes a defining self-story, with consequences for hope, stigma, and recovery—without treating identity as inherently pathological.
    Limitations
    Conceptual; originally focused on severe mental illness, not social-media self-diagnosis.
    Relevance to this project
    Gives a non-pejorative vocabulary for identity integration of diagnostic labels.

    doi:10.1080/15487761003756860

  • 2004narrative reviewContested

    The persistence of folly: A critical examination of dissociative identity disorder. Part I

    Piper, A. & Merskey, H. · The Canadian Journal of Psychiatry

    Sample
    Not stated here
    Platform / condition
    not-platform-specific · did
    Major findings
    A strongly sceptical review of DID as a diagnostic construct, emphasizing iatrogenesis, role enactment, and weak evidence for discrete personalities as natural kinds.
    Limitations
    Polemical; does not reflect later neuroimaging or treatment literature; not about social media.
    Relevance to this project
    Shows that DID controversy long predates TikTok. Online trends must be read against that history.

    doi:10.1177/070674370404900804

  • 2002narrative reviewModerate evidence

    Protean nature of mass sociogenic illness: From possessed nuns to chemical and biological terrorism fears

    Bartholomew, R. E. & Wessely, S. · The British Journal of Psychiatry

    Sample
    Not stated here
    Platform / condition
    not-platform-specific · functional-neurological
    Major findings
    Reviews historical mass sociogenic illness, noting that presentations track culturally available symptom models and beliefs about threat.
    Limitations
    Historical/clinical synthesis; not a social-media study.
    Relevance to this project
    Places current debates in a longer history: socially patterned functional illness is not new.

    doi:10.1192/bjp.180.4.300

  • 1993narrative reviewEstablished

    Emotional contagion

    Hatfield, E., Cacioppo, J. T. & Rapson, R. L. · Current Directions in Psychological Science

    Sample
    Not stated here
    Platform / condition
    not-platform-specific · general-mental-health
    Major findings
    Foundational account of emotional contagion: people can automatically mimic and synchronize affective expressions, producing convergent emotion.
    Limitations
    Laboratory interpersonal processes; far from psychiatric diagnosis on TikTok.
    Relevance to this project
    A mechanism sometimes loosely invoked as “contagion.” Emotional mimicry ≠ disorder transmission.

    doi:10.1111/1467-8721.ep10770953