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Applied psychology · Lesson

Multicultural & Forensic Psychology

How culture shapes the mind and the helping relationship, how psychology serves the courts, and what research says about the "dark" personality traits — narcissism, Machiavellianism, psychopathy and sadism.

A note before you start.

The Dark Triad traits are research dimensions that everyone has to some degree. They are not diagnoses, and this lesson is not a tool for labeling classmates, partners or clients. Forensic evaluations are done only by trained, licensed professionals.

Part 1 · Multicultural psychology

Culture is not an "extra" — it is part of every mind

Multicultural psychology studies how culture, race, ethnicity, gender, class and other identities shape behavior, and it centers the groups that mainstream research has often left out1.

Why it matters: the WEIRD problem

Most psychology studies have sampled people who are Western, Educated, Industrialized, Rich and Democratic — a small and unusual slice of humanity2. A 2018 analysis found this pattern continued and recommended that researchers report and justify their samples3.

Culture, race and ethnicity

Culture is learned and shared; race is a social category with real consequences but little biological basis; ethnicity is shared ancestry and heritage. Individualism is rising worldwide, yet cultural differences in independence and interdependence remain4.

Identity development

Racial identity models describe how people come to understand race in their own lives. Cross's Nigrescence model moves from Pre-Encounter through Encounter and Immersion-Emersion to Internalization; Helms's model uses similar statuses. A 2020 study applying Helms's model found that Black and Latinx students with more developed racial identity attitudes used more active coping5.

Racism and health

Structural racism — in housing, schools, policing and health care — shapes health across the life course6. Repeated racial discrimination can cause racial trauma, with both individual and collective injury7.

Microaggressions

Brief, everyday slights that communicate hostility toward a marginalized group. Sue's taxonomy names microassaults, microinsults and microinvalidations8. A meta-analysis links microaggressions to poorer mental health9, and the concept has been defended against critiques10.

Intersectionality

Coined by legal scholar Kimberlé Crenshaw: overlapping identities create distinct experiences of oppression and privilege11. Elizabeth Cole showed how psychologists can study it — asking who is included, where inequality lies and where similarities exist12.

Interactive · Berry's acculturation model

Two questions, four strategies

When cultures meet, people answer two questions: Do I keep my heritage culture? and Do I take part in the larger society?13 Tap a strategy.

What research suggests

Acculturative stress is moderately linked to depression and distress14. The "best" strategy also depends on whether the larger society welcomes diversity.

Part 2 · Practice

Becoming a culturally responsive helper

1992

Tripartite model

Sue, Arredondo and McDavis: counselors need awareness of their own biases, knowledge of clients' worldviews, and culturally appropriate skills15.

2016

MSJCC

The Multicultural and Social Justice Counseling Competencies add privilege, oppression and advocacy — counselors act at individual, community and policy levels16.

Stance

Cultural humility

An other-oriented, respectful and curious stance; clients who see their therapist as culturally humble report a stronger working alliance and more improvement17.

2017 · APA

Multicultural Guidelines

APA's ten guidelines use an ecological model: identity, context, intersectionality and strengths18.

DSM-5-TR

Cultural Formulation Interview

16 questions on how the client understands the problem, cultural stressors and supports, and what help they expect; clinicians and patients rate it as useful19.

Treatment

Cultural adaptation

Meta-analyses show culturally adapted treatments outperform unadapted versions, especially when adapted to clients' language and values2021.

Part 3 · Forensic psychology

Psychology in the courtroom and the justice system

Forensic psychology applies psychological science to legal questions. APA recognized it as a specialty in 2001.

RoleWhat the psychologist asksResearch says
Competency to stand trialCan this person understand the proceedings and help their lawyer now? (Dusky v. U.S., 1960)Competency is the most common forensic evaluation; reformers call for community-based restoration and fewer jail waits22.
Insanity / criminal responsibilityAt the time of the act, did the person know it was wrong (M'Naghten) or lack capacity to conform (ALI)?Raised rarely and succeeds even more rarely; very different from competency.
Violence risk assessmentHow likely is future violence, and what would reduce it?Tools predict modestly and are better at ruling out low risk23; structured professional judgment such as the HCR-20 is widely used24. Inputs like arrest history can carry racial disparities25.
Eyewitness memoryHow can lineups avoid mistaken identifications?Double-blind lineups, fair fillers, warnings that the culprit may not be present, and recording confidence immediately26. Initial high confidence under good conditions is informative27.
Interrogations and confessionsWhy would an innocent person confess?Pressure, isolation, false evidence ploys and youth raise risk; false confessions appear in many DNA exonerations28.
Juvenile justiceAre adolescents as responsible as adults?In 5,227 young people from 11 countries, thinking ability reached adult levels around 16, but the ability to hold back in emotional or risky moments kept developing past 1829 — evidence cited in cases like Roper v. Simmons.
Psychopathy assessmentDoes the person show the interpersonal-affective core of psychopathy?Measured by the PCL-R; most psychopathic offenders meet ASPD criteria, but most people with ASPD are not psychopathic30.
Culture in forensic work.

Bias can enter through tests normed on narrow samples, through interpreters, and through risk-tool inputs shaped by unequal policing252. Multicultural competence is a forensic skill, not a separate topic.

Timeline · Psychology and the law

Milestones in forensic psychology

Court cases are primary legal sources (public court records).

  1. 1843M'Naghten's Case (England): the "did not know it was wrong" insanity test.
  2. 1908Hugo Münsterberg's On the Witness Stand applies psychology to eyewitness testimony.
  3. 1923Frye v. U.S.: expert evidence must be "generally accepted."
  4. 1954Brown v. Board cites the Clarks' social science research (footnote 11).
  5. 1960Dusky v. U.S. sets the competency standard.
  6. 1962Jenkins v. U.S.: psychologists may testify as experts on mental disorder; ALI insanity test published.
  7. 1976Tarasoff: therapists' duty to protect identifiable potential victims.
  8. 1984Insanity Defense Reform Act after the Hinckley verdict.
  9. 1986Ford v. Wainwright: no execution of a prisoner who is insane.
  10. 1993Daubert: judges as gatekeepers of scientific evidence.
  11. 2002Atkins v. Virginia: no execution of people with intellectual disability.
  12. 2005Roper v. Simmons: no death penalty for crimes under 1829.
  13. 2012Miller v. Alabama: no mandatory life without parole for juveniles.
  14. 2014Hall v. Florida: a rigid IQ cutoff of 70 is unconstitutional.
  15. 2020Evidence-based eyewitness identification recommendations26.
Part 4 · The Dark Triad (and Tetrad)

The dark side of personality

Paulhus and Williams (2002) described three overlapping but distinct "dark" traits31. Sadism was added in 2013 to form the Dark Tetrad32. All share a common core — the D factor: maximizing one's own gain at others' expense, plus beliefs that justify it33. They are linked to low agreeableness and low honesty-humility34.

D Narcissism Machiavellianism Psychopathy + Sadism = Dark Tetrad

How it is measured

Brief self-report scales such as the 27-item Short Dark Triad (SD3)35. Cross-cultural studies of the 12-item "Dirty Dozen" across world regions show only partial measurement invariance, so comparing averages between cultures needs caution36.

Brain and development

Youths with psychopathic traits show reduced amygdala responses to others' distress and differences in ventromedial prefrontal decision-making37. A meta-analysis of brain imaging found altered activity in regions for emotion and social cognition in psychopathy38.

What dark traits predict

In a large meta-analysis, Machiavellianism and psychopathy predicted poorer job performance and counterproductive work behavior39. Narcissism predicts aggression mainly after provocation or ego threat40.

Cautions

Most findings come from WEIRD samples and self-report questionnaires, and reviewers call for more multi-informant, long-term studies234. Grandiose and vulnerable narcissism behave very differently41. Scores describe tendencies on a continuum, not a person's whole character.

Practice

Flashcards and games

References

Peer-reviewed sources (43)

29 of 43 are from 2016 or later. Older items are the founding papers of a concept (for example, Paulhus & Williams, 2002, which named the Dark Triad) and are labeled. Each was checked against PubMed or Crossref.

  1. 1
    2016Peer-reviewedLast 10 years
    Hall, G. C. N., Yip, T., & Zárate, M. A. (2016). On becoming multicultural in a monocultural research world: A conceptual approach to studying ethnocultural diversity. American Psychologist, 71(1), 40–51. https://doi.org/10.1037/a0039734
  2. 2
    2010Peer-reviewedFoundational (pre-2016)
    Henrich, J., Heine, S. J., & Norenzayan, A. (2010). The weirdest people in the world? Behavioral and Brain Sciences, 33(2–3), 61–83. https://doi.org/10.1017/S0140525X0999152X
  3. 3
    2018Peer-reviewedLast 10 years
    Rad, M. S., Martingano, A. J., & Ginges, J. (2018). Toward a psychology of Homo sapiens: Making psychological science more representative of the human population. Proceedings of the National Academy of Sciences, 115(45), 11401–11405. https://doi.org/10.1073/pnas.1721165115
  4. 4
    2017Peer-reviewedLast 10 years
    Santos, H. C., Varnum, M. E. W., & Grossmann, I. (2017). Global increases in individualism. Psychological Science, 28(9), 1228–1239. https://doi.org/10.1177/0956797617700622
  5. 5
    2020Peer-reviewedLast 10 years
    Lewis, J. A., Cameron, R. P., Kim-Ju, G. M., & Meyers, L. S. (2020). Examining the association between racial identity attitudes and coping with racism-related stress. Journal of Multicultural Counseling and Development, 48(2), 108–119. https://doi.org/10.1002/jmcd.12169
  6. 6
    2019Peer-reviewedLast 10 years
    Williams, D. R., Lawrence, J. A., & Davis, B. A. (2019). Racism and health: Evidence and needed research. Annual Review of Public Health, 40, 105–125. https://doi.org/10.1146/annurev-publhealth-040218-043750
  7. 7
    2019Peer-reviewedLast 10 years
    Comas-Díaz, L., Hall, G. N., & Neville, H. A. (2019). Racial trauma: Theory, research, and healing: Introduction to the special issue. American Psychologist, 74(1), 1–5. https://doi.org/10.1037/amp0000442
  8. 8
    2007Peer-reviewedFoundational (pre-2016)
    Sue, D. W., Capodilupo, C. M., Torino, G. C., Bucceri, J. M., Holder, A. M. B., Nadal, K. L., & Esquilin, M. (2007). Racial microaggressions in everyday life: Implications for clinical practice. American Psychologist, 62(4), 271–286. https://doi.org/10.1037/0003-066X.62.4.271
  9. 9
    2019Peer-reviewedLast 10 years
    Lui, P. P., & Quezada, L. (2019). Associations between microaggression and adjustment outcomes: A meta-analytic and narrative review. Psychological Bulletin, 145(1), 45–78. https://doi.org/10.1037/bul0000172
  10. 10
    2020Peer-reviewedLast 10 years
    Williams, M. T. (2020). Microaggressions: Clarification, evidence, and impact. Perspectives on Psychological Science, 15(1), 3–26. https://doi.org/10.1177/1745691619827499
  11. 11
    1991Book / otherFoundational (pre-2016)
    Crenshaw, K. (1991). Mapping the margins: Intersectionality, identity politics, and violence against women of color. Stanford Law Review, 43(6), 1241–1299. https://doi.org/10.2307/1229039
  12. 12
    2009Peer-reviewedFoundational (pre-2016)
    Cole, E. R. (2009). Intersectionality and research in psychology. American Psychologist, 64(3), 170–180. https://doi.org/10.1037/a0014564
  13. 13
    1997Peer-reviewedFoundational (pre-2016)
    Berry, J. W. (1997). Immigration, acculturation, and adaptation. Applied Psychology, 46(1), 5–34. https://doi.org/10.1111/j.1464-0597.1997.tb01087.x
  14. 14
    2024Peer-reviewedLast 10 years
    Soufi Amlashi, R., Majzoobi, M., & Forstmeier, S. (2024). The relationship between acculturative stress and psychological outcomes in international students: A systematic review and meta-analysis. Frontiers in Psychology, 15, Article 1403807. https://doi.org/10.3389/fpsyg.2024.1403807
  15. 15
    1992Peer-reviewedFoundational (pre-2016)
    Sue, D. W., Arredondo, P., & McDavis, R. J. (1992). Multicultural counseling competencies and standards: A call to the profession. Journal of Counseling & Development, 70(4), 477–486. https://doi.org/10.1002/j.1556-6676.1992.tb01642.x
  16. 16
    2016Peer-reviewedLast 10 years
    Ratts, M. J., Singh, A. A., Nassar-McMillan, S., Butler, S. K., & McCullough, J. R. (2016). Multicultural and social justice counseling competencies: Guidelines for the counseling profession. Journal of Multicultural Counseling and Development, 44(1), 28–48. https://doi.org/10.1002/jmcd.12035
  17. 17
    2013Peer-reviewedFoundational (pre-2016)
    Hook, J. N., Davis, D. E., Owen, J., Worthington, E. L., Jr., & Utsey, S. O. (2013). Cultural humility: Measuring openness to culturally diverse clients. Journal of Counseling Psychology, 60(3), 353–366. https://doi.org/10.1037/a0032595
  18. 18
    2019Peer-reviewedLast 10 years
    Clauss-Ehlers, C. S., Chiriboga, D. A., Hunter, S. J., Roysircar, G., & Tummala-Narra, P. (2019). APA Multicultural Guidelines executive summary: Ecological approach to context, identity, and intersectionality. American Psychologist, 74(2), 232–244. https://doi.org/10.1037/amp0000382
  19. 19
    2017Peer-reviewedLast 10 years
    Lewis-Fernández, R., Aggarwal, N. K., Lam, P. C., Galfalvy, H., Weiss, M. G., Kirmayer, L. J., Paralikar, V., Deshpande, S. N., Díaz, E., Nicasio, A. V., Boiler, M., Alarcón, R. D., Rohlof, H., Groen, S., van Dijk, R. C., Jadhav, S., Sarmukaddam, S., Ndetei, D., Scalco, M. Z., . . . Vega-Dienstmaier, J. M. (2017). Feasibility, acceptability and clinical utility of the Cultural Formulation Interview: Mixed-methods results from the DSM-5 international field trial. British Journal of Psychiatry, 210(4), 290–297. https://doi.org/10.1192/bjp.bp.116.193862
  20. 20
    2016Peer-reviewedLast 10 years
    Hall, G. C. N., Ibaraki, A. Y., Huang, E. R., Marti, C. N., & Stice, E. (2016). A meta-analysis of cultural adaptations of psychological interventions. Behavior Therapy, 47(6), 993–1014. https://doi.org/10.1016/j.beth.2016.09.005
  21. 21
    2018Peer-reviewedLast 10 years
    Soto, A., Smith, T. B., Griner, D., Domenech Rodríguez, M., & Bernal, G. (2018). Cultural adaptations and therapist multicultural competence: Two meta-analytic reviews. Journal of Clinical Psychology, 74(11), 1907–1923. https://doi.org/10.1002/jclp.22679
  22. 22
    2020Peer-reviewedLast 10 years
    Callahan, L., & Pinals, D. A. (2020). Challenges to reforming the competence to stand trial and competence restoration system. Psychiatric Services, 71(7), 691–697. https://doi.org/10.1176/appi.ps.201900483
  23. 23
    2012Peer-reviewedFoundational (pre-2016)
    Fazel, S., Singh, J. P., Doll, H., & Grann, M. (2012). Use of risk assessment instruments to predict violence and antisocial behaviour in 73 samples involving 24 827 people: Systematic review and meta-analysis. BMJ, 345, Article e4692. https://doi.org/10.1136/bmj.e4692
  24. 24
    2023Peer-reviewedLast 10 years
    Chen, Y., Douglas, K. S., Zhang, Z., Xiao, C., Wang, H., Wang, Y., & Ma, A. (2023). Evaluating the HCR-20V3 violence risk assessment measure with mentally disordered offenders and civil psychiatric patients in China. Behavioral Sciences & the Law, 41(4), 186–206. https://doi.org/10.1002/bsl.2614
  25. 25
    2016Peer-reviewedLast 10 years
    Skeem, J. L., & Lowenkamp, C. T. (2016). Risk, race, and recidivism: Predictive bias and disparate impact. Criminology, 54(4), 680–712. https://doi.org/10.1111/1745-9125.12123
  26. 26
    2020Peer-reviewedLast 10 years
    Wells, G. L., Kovera, M. B., Douglass, A. B., Brewer, N., Meissner, C. A., & Wixted, J. T. (2020). Policy and procedure recommendations for the collection and preservation of eyewitness identification evidence. Law and Human Behavior, 44(1), 3–36. https://doi.org/10.1037/lhb0000359
  27. 27
    2017Peer-reviewedLast 10 years
    Wixted, J. T., & Wells, G. L. (2017). The relationship between eyewitness confidence and identification accuracy: A new synthesis. Psychological Science in the Public Interest, 18(1), 10–65. https://doi.org/10.1177/1529100616686966
  28. 28
    2017Peer-reviewedLast 10 years
    Kassin, S. M. (2017). False confessions: How can psychology so basic be so counterintuitive? American Psychologist, 72(9), 951–964. https://doi.org/10.1037/amp0000195
  29. 29
    2019Peer-reviewedLast 10 years
    Icenogle, G., Steinberg, L., Duell, N., Chein, J., Chang, L., Chaudhary, N., Di Giunta, L., Dodge, K. A., Fanti, K. A., Lansford, J. E., Oburu, P., Pastorelli, C., Skinner, A. T., Sorbring, E., Tapanya, S., Uribe Tirado, L. M., Alampay, L. P., Al-Hassan, S. M., Takash, H. M. S., & Bacchini, D. (2019). Adolescents' cognitive capacity reaches adult levels prior to their psychosocial maturity: Evidence for a "maturity gap" in a multinational, cross-sectional sample. Law and Human Behavior, 43(1), 69–85. https://doi.org/10.1037/lhb0000315
  30. 30
    2022Peer-reviewedLast 10 years
    Patrick, C. J. (2022). Psychopathy: Current knowledge and future directions. Annual Review of Clinical Psychology, 18, 387–415. https://doi.org/10.1146/annurev-clinpsy-072720-012851
  31. 31
    2002Peer-reviewedFoundational (pre-2016)
    Paulhus, D. L., & Williams, K. M. (2002). The Dark Triad of personality: Narcissism, Machiavellianism, and psychopathy. Journal of Research in Personality, 36(6), 556–563. https://doi.org/10.1016/S0092-6566(02)00505-6
  32. 32
    2013Peer-reviewedFoundational (pre-2016)
    Buckels, E. E., Jones, D. N., & Paulhus, D. L. (2013). Behavioral confirmation of everyday sadism. Psychological Science, 24(11), 2201–2209. https://doi.org/10.1177/0956797613490749
  33. 33
    2018Peer-reviewedLast 10 years
    Moshagen, M., Hilbig, B. E., & Zettler, I. (2018). The dark core of personality. Psychological Review, 125(5), 656–688. https://doi.org/10.1037/rev0000111
  34. 34
    2017Peer-reviewedLast 10 years
    Muris, P., Merckelbach, H., Otgaar, H., & Meijer, E. (2017). The malevolent side of human nature. Perspectives on Psychological Science, 12(2), 183–204. https://doi.org/10.1177/1745691616666070
  35. 35
    2014Peer-reviewedFoundational (pre-2016)
    Jones, D. N., & Paulhus, D. L. (2014). Introducing the Short Dark Triad (SD3): A brief measure of dark personality traits. Assessment, 21(1), 28–41. https://doi.org/10.1177/1073191113514105
  36. 36
    2021Peer-reviewedLast 10 years
    Rogoza, R., Żemojtel-Piotrowska, M., Jonason, P. K., Piotrowski, J., Campbell, K. W., Gebauer, J. E., Maltby, J., Sedikides, C., Adamovic, M., Adams, B. G., Ang, R. P., Ardi, R., Atitsogbe, K. A., Baltatescu, S., Bilić, S., Bodroža, B., Gruneau Brulin, J., Bundhoo Poonoosamy, H. Y., Chaleeraktrakoon, T., . . . Włodarczyk, A. (2021). Structure of Dark Triad Dirty Dozen across eight world regions. Assessment, 28(4), 1125–1135. https://doi.org/10.1177/1073191120922611
  37. 37
    2013Peer-reviewedFoundational (pre-2016)
    Blair, R. J. R. (2013). The neurobiology of psychopathic traits in youths. Nature Reviews Neuroscience, 14(11), 786–799. https://doi.org/10.1038/nrn3577
  38. 38
    2019Peer-reviewedLast 10 years
    Poeppl, T. B., Donges, M. R., Mokros, A., Rupprecht, R., Fox, P. T., Laird, A. R., Bzdok, D., Langguth, B., & Eickhoff, S. B. (2019). A view behind the mask of sanity: Meta-analysis of aberrant brain activity in psychopaths. Molecular Psychiatry, 24(3), 463–470. https://doi.org/10.1038/s41380-018-0122-5
  39. 39
    2012Peer-reviewedFoundational (pre-2016)
    O'Boyle, E. H., Jr., Forsyth, D. R., Banks, G. C., & McDaniel, M. A. (2012). A meta-analysis of the Dark Triad and work behavior: A social exchange perspective. Journal of Applied Psychology, 97(3), 557–579. https://doi.org/10.1037/a0025679
  40. 40
    2016Peer-reviewedLast 10 years
    Rasmussen, K. (2016). Entitled vengeance: A meta-analysis relating narcissism to provoked aggression. Aggressive Behavior, 42(4), 362–379. https://doi.org/10.1002/ab.21632
  41. 41
    2017Peer-reviewedLast 10 years
    Miller, J. D., Lynam, D. R., Hyatt, C. S., & Campbell, W. K. (2017). Controversies in narcissism. Annual Review of Clinical Psychology, 13, 291–315. https://doi.org/10.1146/annurev-clinpsy-032816-045244
  42. 42
    2025Peer-reviewedLast 10 years
    Shukla, M., & Upadhyay, N. (2025). Cold hearts and dark minds: A systematic review and meta-analysis of empathy across dark triad personalities. Frontiers in Psychiatry, 16, Article 1546917. https://doi.org/10.3389/fpsyt.2025.1546917
  43. 43
    2009Peer-reviewedFoundational (pre-2016)
    Patrick, C. J., Fowles, D. C., & Krueger, R. F. (2009). Triarchic conceptualization of psychopathy: Developmental origins of disinhibition, boldness, and meanness. Development and Psychopathology, 21(3), 913–938. https://doi.org/10.1017/S0954579409000492