In response to a rise in extremism among Western youth, a new wave of research is addressing the interaction between adolescent development and extremism. This coincides with a renewed interest in psychological vulnerabilities, following a long period where psychological factors—narrowly defined as diagnosed mental illnesses—were considered to be poorly correlated with extremism. Given the impact of psychological vulnerabilities on adolescent development, this life phase is of particular relevance to understanding the relationship between psychological vulnerabilities and extremism. In this review, twenty-five peer-reviewed empirical studies are analyzed with the aim of taking stock of current understandings of the effect of psychological vulnerabilities on young Westerners’ propensity to endorse or engage in extremism. Six main categories of factors are observed: mental illness, traumatic experiences, early socialization, perceived discrimination, social capital and delinquency. These factors, indicative of psychological vulnerabilities, seem to play a critical role in the development of extremism among Western youth. It also appears that adolescence, a period of identity and ideology formation, influences these relationships. Overall, this review implies that the previous focus on the psychology of extremism has been too narrow. Future research should expand its scope to examine factors indicative of psychological vulnerabilities.
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Adler, N. E., Boyce, T., Chesney, M. A., Cohen, S., Folkman, S., Kahn, R. L., & Syme, S. L. (1994). Socioeconomic status and health: The challenge of the gradient. American Psychologist, 49(1), 15.
Agnew, R. (1992). Foundation for a general strain theory of crime and delinquency. Criminology, 30(1), 47–88.
Agnew, R. (2001). Building on the foundation of general strain theory: Specifying the types of strain most likely to lead to crime and delinquency. Journal of Research in Crime and Delinquency, 38(4), 319–361.
American Psychiatric Association (APA). (2013). Diagnostic and Statistical Manual of Mental Disorders (5th edn.). Washington D.C.: American Psychiatric Association.
Arseneault, L., Bowes, L., & Shakoor, S. (2010). Bullying victimization in youths and mental health problems: ‘Much Ado About Nothing’? Psychological Medicine, 40(5), 717–729.
Baumeister, R. F., & Leary, M. R. (1997). Writing narrative literature reviews. Review of General Psychology, 1(3), 311–320.
Baumrind, D. (1971). Current patterns of parental authority. Developmental Psychology Monograph, 4(1), 1–103.
Bertelsen, P. (2015). Danish preventive measures and de-radicalization strategies: The Aarhus model. Panorama Insights into Asian and European Affairs, 1, 241–253.
Bhui, K., Warfa, N., & Jones, E. (2014). Is violent radicalisation associated with poverty, migration, poor self-reported health and common mental disorders? PloS One, 9(3), 1–10.
Bifulco, A., Moran, P. M., Ball, C., Jacobs, C., Baines, R., Bunn, A., & Cavagin, J. (2002). Childhood adversity, parental vulnerability and disorder: Examining inter-generational transmission of risk. Journal of Child Psychology and Psychiatry, 43(8), 1075–1086.
Bjørgo, T. (2004). Root Causes of Terrorism: Myths, Reality and Ways Forward. London: Routledge.
Bjørgo, T. (2005). Conflict processes between youth groups in a Norwegian City: Polarisation and revenge. European Journal of Crime, Criminal Law and Criminal Justice, 13(1), 44–74.
Bjørgo, T., & Gjelsvik, I. M. (2015a). Forskning på forbygging av radikalisering og voldelig ekstremisme: En kunnskapsstatus (No. PHS Forskning 2015: 2). Oslo: Politihøgskolen.
Bjørgo, T., & Gjelsvik, I. M. (2015b). Norwegian Research on the Prevention of Radicalisation and Violent Extremism: A Status of Knowledge (No. 22). Oslo: PHS Forskning.
Boehnke, K., Hagan, J., & Merkens, H. (1998). Right-wing extremism among german adolescents: Risk factors and protective factors. Applied Psychology, 47(1), 109–126.
Booth, A., Sutton, A., & Papaioannou, D. (2016). Systematic Approaches to a Successful Literature Review (2nd edn.). London: SAGE Publications.
Borum, R. (2004). Psychology of Terrorism (1st ed.). Tampa: University of South Florida. Retrieved April 9, 2018, from https://works.bepress.com/randy_borum/1/.
Borum, R. (2011). Radicalization into violent extremism II: A review of conceptual models and empirical research. Journal of Strategic Security, 4(4), 37–62.
Borum, R. (2014). Psychological vulnerabilities and propensities for involvement in violent extremism: “Mindset”, worldview and involvement in violent extremism. Behavioral Sciences & the Law, 32(3), 286–305.
Bowlby, J. (1951). Maternal Care and Mental Health. Geneva: World Health Organization.
Buka, S. L., Stichick, T. L., Birdthistle, I., & Earls, F. J. (2001). Youth exposure to violence: Prevalence, risks and consequences. American Journal of Orthopsychiatry, 71(3), 298–310.
Chenoweth, E., & Moore, P. L. (2018). The Politics of Terror. Oxford: Oxford University Press.
Coid, J. W., Bhui, K., MacManus, D., Kallis, C., Bebbington, P., & Ullrich, S. (2016). Extremism, religion and psychiatric morbidity in a population-based sample of young men. British Journal of Psychiatry, 209(6), 491–497.
Coolican, H. (2013). Research Methods and Statistics in Psychology (5th edn.). New York: Routledge.
Cooper, H. M. (2010). Research synthesis and meta-analysis: A step-by-step approach (5th edn.). Thousand Oaks: SAGE Publications.
Copeland, W. E., Wolke, D., Angold, A., & Costello, E. J. (2013). Adult psychiatric outcomes of bullying and being bullied by peers in childhood and adolescence. The Journal of the American Medical Association (JAMA) Psychiatry, 70(4), 419–426.
Crenshaw, M. (1986). The Psychology of Political Terrorism. In M. G. Herman (Ed.), Political Psychology: Contemporary Problems and Issues (pp. 379–413). San Fransisco: Jossey-Bass.
Crenshaw, M. (1992). Decisions to use terrorism: Psychological constraints on instrumental reasoning. International Social Movements Research, 4(1), 29–42.
Dalgaard-Nielsen, A. (2013). Promoting exit from violent extremism: Themes and approaches. Studies in Conflict & Terrorism, 36(2), 99–115.
Davydov, D. G. (2015). The causes of youth extremism and ways to prevent it in the educational environment. Russian Education & Society, 57(3), 146–162.
DeAngelis, T. (2009). Understanding terrorism. Monitor on Psychology, 40(10), 60.
Dion, K. L. (2002). The social psychology of perceived prejudice and discrimination. Canadian Psychology, 43(1), 1–10.
Dixon-Woods, M., Agarwal, S., Jones, D., Young, B., & Sutton, A. (2005). Synthesising qualitative and quantitative evidence: A review of possible methods. Journal of Health Services Research & Policy, 10(1), 45–53.
Dixon-Woods, M., Fitzpatrick, R., & Roberts, K. (2001). Including qualitative research in systematic reviews: opportunities and problems. Journal of Evaluation in Clinical Practice, 7(2), 125–133.
Dodge, K. A., & Pettit, G. S. (2003). A biopsychosocial model of the development of chronic conduct problems in adolescence. Developmental Psychology, 39(2), 349–371.
Doosje, B., Loseman, A., & van den Bos, K. (2013). Determinants of radicalization of islamic youth in the Netherlands: Personal uncertainty, perceived injustice, and perceived group threat. Journal of Social Issues, 69(3), 586–604.
Doosje, B., van den Bos, K., Loseman, A., Feddes, A. R., & Mann, L. (2012). ‘My In-Group is Superior!’: Susceptibility for radical right-wing attitudes and behaviors in Dutch youth. Negotiation and Conflict Management Research, 5(3), 253–268.
Douglass, R. W., & Rondeaux, C. (2017). Mining the Gaps: A Text Mining-Based Meta-Analysis of the Current State of Research on Violent Extremism. Washington D.C.: United States Institute of Peace (USIP).
Ellis, B. H., Abdi, S. M., Horgan, J. G., Miller, A. B., Saxe, G. N., & Blood, E. (2015). Trauma and openness to legal and illegal activism among somali refugees. Terrorism and Political Violence, 27(5), 857–883.
Ellis, B. H., Abdi, S. M., Lazarevic, V., White, M. T., Lincoln, A. K., Stern, J. E., & Horgan, J. G. (2016). Relation of psychosocial factors to diverse behaviors and attitudes among somali refugees. American Journal of Orthopsychiatry, 86(4), 393–408.
Erikson, E. H. (1956). The problem of ego identity. Journal of the American Psychoanalytic Association, 4(1), 56–121.
Ezekiel, R. S. (2002). An ethnographer looks at Neo-Nazi and Klan groups: The racist mind revisited. American Behavioral Scientist, 46(1), 51–71.
Farrington, D. P. (2003). Developmental and life-course criminology: Key theoretical and empirical issues—the 2002 Sutherland Award address. Criminology, 41(2), 221–225.
Fergusson, D. M., Horwood, L. J., & Ridder, E. M. (2005). Show me the child at seven: The consequences of conduct problems in childhood for psychosocial functioning in adulthood. Journal of Child Psychology and Psychiatry, 46(8), 837–849.
Fergusson, D. M., & Lynskey, M. T. (1998). Conduct problems in childhood and psychosocial outcomes in young adulthood: A prospective study. Journal of Emotional and Behavioral Disorders, 6(1), 2–18.
Fergusson, D. M., McLeod, G. F., & Horwood, L. J. (2015). Leaving school without qualifications and mental health problems to age 30. Social Psychiatry and Psychiatric Epidemiology, 50(3), 469–478.
Ferrari, R. (2015). Writing narrative style literature reviews. Medical Writing, 24(4), 230–235.
Festinger, L. (1954). A theory of social comparison processes. Human Relations, 7(2), 117–140.
Flaherty, L. T. (2003). Youth, ideology, and terrorism. Adolescent Psychiatry, 27, 29–58.
Flanagan, C. (2002). Early Socialisation: Sociability and Attachment. London: Routledge.
Frankl, V. E. (1985). Man’s search for meaning. New York, NY: Simon and Schuster
Gilbert, R., Widom, C. S., Browne, K., Fergusson, D., Webb, E., & Janson, S. (2009). Burden and consequences of child maltreatment in high-income countries. The Lancet, 373(9657), 68–81.
Green, B. N., Johnson, C. D., & Adams, A. (2006). Writing narrative literature reviews for peer-reviewed journals: secrets of the trade. Journal of Chiropractic Medicine, 5(3), 101–117.
Hagan, J., Merkens, H., & Boehnke, K. (1995). Delinquency and disdain: Social capital and the control of right-wing extremism among east and west Berlin youth. American Journal of Sociology, 100(4), 1028–1052.
Hagan, J., Rippl, S., Boehnke, K., & Merkens, H. (1999). The interest in evil: Hierarchic self-interest and right-wing extremism among East and West German youth. Social Science Research, 28(2), 162–183.
Hales, A. H., & Williams, K. D. (2018). Marginalized individuals and extremism: The role of ostracism in openness to extreme groups. Journal of Social Issues, 74(1), 75–92.
Harpviken, A. (2018). Extremism and psychological vulnerabilities in Norwegian youth. Paper presented at the Nordic Conference on Violent extremism: Theory and practice. Norway: University of Oslo.
Hartup, W. W. (1989). Social relationships and their developmental significance. American Psychologist, 44(2), 120.
Harvey, A. G. (2004). Cognitive Behavioural Processes Across Psychological Disorders: A Transdiagnostic Approach to Research and Treatment. Oxford: Oxford University Press.
Hogg, M. A. (2014). From uncertainty to extremism: social categorization and identity processes. Current Directions in Psychological Science, 23(5), 338–342.
Hong, Q. N., Pluye, P., Bujold, M., & Wassef, M. (2017). Convergent and sequential synthesis designs: implications for conducting and reporting systematic reviews of qualitative and quantitative evidence. Systematic Reviews, 6(1), 61.
Horgan, J. G. (2004). The Social and Psychological Characteristics of Terrorism and Terrorists. In T. Bjørgo (Ed.), Root Causes of Terrorism: Myths, Reality and Ways Forward (pp. 44–54). New York: Routledge.
Horgan, J. G. (Ed.). (2014). The Psychology of Terrorism (2nd edn.). London: Routledge.
Hudson, R. A. (1999). The Sociology and Psychology of Terrorism: Who Becomes a Terrorist and Why? Washington D.C.: Library of Congress.
Idsoe, T., Dyregrov, A., & Idsoe, E. C. (2012). Bullying and PTSD symptoms. Journal of Abnormal Child Psychology, 40(6), 901–911.
Ingram, R. E., & Luxton, D. D. (2005). Vulnerability-Stress Models. In B. J. Hankin & J. R. Z. Abela (Eds.), Development of Psychopathology: A Vulnerability-Stress Perspective (pp. 32–46). London: SAGE Publications.
Jamieson, A. (2004). The Use of Terrorism by Organized Crime. In Root Causes of Terrorism: Myths, Reality and Ways Forward (pp. 164–177). New York: Routledge.
Joseph, S., Williams, R., & Yule, W. (1995). Psychosocial perspectives on post-traumatic stress. Clinical Psychology Review, 15(6), 515–544.
Kessler, R. C., McGonagle, K. A., Zhao, S., Nelson, C. B., Hughes, M., Eshleman, S., … Kendler, K. S. (1994). Lifetime and 12-month prevalence of DSM-III-R psychiatric disorders in the United States: Results from the National Comorbidity Survey. Archives of General Psychiatry, 51(1), 8–19.
Kim-Cohen, J., Caspi, A., Moffitt, T. E., Harrington, H., Milne, B. J., & Poulton, R. (2003). Prior juvenile diagnoses in adults with mental disorder: Developmental follow-back of a prospective-longitudinal cohort. Archives of General Psychiatry, 60(7), 709–717.
Kimmel, M. (2007). Racism as Adolescent Male Rite of Passage: Ex-Nazis in Scandinavia. Journal of Contemporary Ethnography, 36(2), 202–218.
Kruglanski, A. W., Gelfand, M. J., Bélanger, J. J., Sheveland, A., Hetiarachchi, M., & Gunaratna, R. (2014). The psychology of radicalization and deradicalization: How Significance quest impacts violent extremism. Political Psychology, 35(S1), 69–93.
Kvale, S. (1994). Ten Standard Objections to Qualitative Research Interviews. Journal of Phenomenological Psychology, 25(2), 147–173.
LaFree, G., & Ackerman, G. (2009). The empirical study of terrorism: Social and legal research. Annual Review of Law and Social Science, 5, 347–374.
Lamborn, S. D., Mounts, N. S., Steinberg, L., & Dornbusch, S. M. (1991). Patterns of competence and adjustment among adolescents from authoritative, authoritarian, indulgent, and neglectful families. Child Development, 62(5), 1049–1065.
Marcia, J. E. (1980). Identity in Adolescence. In J. Adelson (Ed.), Handbook of Adolescent Psychology (pp. 159–187). New York: Wiley.
McCauley, C., & Moskalenko, S. (2008). Mechanisms of political radicalization: Pathways toward terrorism. Terrorism and Political Violence, 20(3), 415–433.
Meeus, W. (2016). Adolescent psychosocial development: A review of longitudinal models and research. Developmental Psychology, 52(12), 1969–1993.
Merriam-Webster. (2018). Delinquency. https://www.merriam-webster.com/dictionary/delinquency. Accessed 30 Jul 2018
Moghaddam, F. M. (2005). The staircase to terrorism: A psychological exploration. American Psychologist, 60(2), 161–169.
Moher, D., Liberati, A., Tetzlaff, J., & Altman, D. G. (2009). Preferred reporting items for systematic reviews and meta-analyses: The PRISMA statement. Annals of Internal Medicine, 151(4), 264–269.
Moyano, M., & Trujillo, H. M. (2014). Intention of Activism and Radicalism among Muslim and Christian Youth in a Marginal Neighbourhood in a Spanish City. Revista de Psicología Social, 29(1), 90–120.
Munton, T., Martin, A., Lorenc, T., Marrero-Guillamon, I., Jamal, F., Lehmann, A., … Sexton, M. (2011). Understanding Vulnerability and Resilience in Individuals to the Influence of Al Qaida Violent Extremism: A Rapid Evidence Assessment. United Kingdom: National Counter Terrorism Security Office (NaCTSO).
Murer, J. S. (2011). The European Study of Youth Mobilisation Report: Listening to Radicals: Attitudes and Motivations of Young People Engaged in Political and Social Movements Outside of the Mainstream in Central and Nordic Europe. Hungary: British Council.
Nivette, A., Eisner, M., & Ribeaud, D. (2017). Developmental predictors of violent extremist attitudes: A test of general strain theory. Journal of Research in Crime & Delinquency, 54(6), 755–790.
Osofsky, J. D. (1995). The effect of exposure to violence on young children. American Psychologist, 50(9), 782–788.
Pace, R., Pluye, P., Bartlett, G., Macaulay, A. C., Salsberg, J., Jagosh, J., & Seller, R. (2012). Testing the reliability and efficiency of the pilot Mixed Methods Appraisal Tool (MMAT) for systematic mixed studies review. International Journal of Nursing Studies, 49(1), 47–53.
Pascoe, E. A., & Richman, L. S. (2009). Perceived discrimination and health: A meta-analytic review. Psychological Bulletin, 135(4), 531–554.
Pauwels, L., & De Waele, M. (2014). Youth involvement in politically motivated violence: Why do social integration, perceived legitimacy, and perceived discrimination matter? International Journal of Conflict and Violence; Bielefeld, 8(1), 134–153.
Pauwels, L., & Schils, N. (2016). Differential online exposure to extremist content and political violence: Testing the relative strength of social learning and competing perspectives. Terrorism and Political Violence, 28(1), 1–29.
Pauwels, L., & Svensson, R. (2017). How robust is the moderating effect of extremist beliefs on the relationship between self-control and violent extremism? Crime & Delinquency, 63(8), 1000–1016.
Pedersen, W., Vestel, V., & Bakken, A. (2017). At risk for radicalization and jihadism? A population-based study of Norwegian adolescents. Cooperation and Conflict, 53(1), 61–83.
Pels, T., & Ruyter, D. (2012). The influence of education and socialization on radicalization: An exploration of theoretical presumptions and empirical research. Child & Youth Care Forum, 41(3), 311–325.
Perry, B. D., Pollard, R. A., Blakley, T. L., Baker, W. L., & Vigilante, D. (1995). Childhood trauma, the neurobiology of adaptation, and ‘use dependent’ development of the brain: How ‘states’ become ‘traits’. Infant Mental Health Journal, 16(4), 271–291.
Pluye, P., Gagnon, M.-P., Griffiths, F., & Johnson-Lafleur, J. (2009). A scoring system for appraising mixed methods research, and concomitantly appraising qualitative, quantitative and mixed methods primary studies in mixed studies reviews. International Journal of Nursing Studies, 46(4), 529–546.
Pluye, P., & Hong, Q. N. (2014). Combining the power of stories and the power of numbers: Mixed methods research and mixed studies reviews. Annual Review of Public Health, 35(1), 29–45.
Pluye, P., Robert, E., Cargo, M., Bartlett, G., O’Cathain, A., Griffiths, F., & Rousseau, M. C. (2011). Proposal: A mixed methods appraisal tool for systematic mixed studies reviews. http://mixedmethodsappraisaltoolpublic.pbworks.com/w/page/24607821/FrontPage. Accessed 5 Mar 2018
Popay, J., Roberts, H., Sowden, A., Petticrew, M., Arai, L., Rodgers, M., & Duffy, S. (2006). Guidance on the Conduct of Narrative Synthesis in Systematic Reviews. A Product from the ESRC Methods Programme Version, 1, b92.
Post, J. (2004). The Socio-Cultural Underpinnings of Terrorist Psychology: When Hatred is Bred in the Bone. In T. Bjørgo (Ed.), Root Causes of Terrorism: Myths, Reality and Ways Forward. New York: Routledge.
Putnam, R. (2001a). Bowling alone: The collapse and revival of American community. New York: Simon and Schuster.
Putnam, R. (2001b). Social capital: Measurement and consequences. Canadian Journal of Policy Research, 2(1), 41–51.
Robins, L. N. (1991). Conduct disorder. Journal of Child Psychology and Psychiatry, 32(1), 193–212.
Rose, G. (1981). Strategy of prevention: Lessons from cardiovascular disease. British Medical Journal (Clinical Research Ed.), 282(6279), 1847.
Rutter, M. (1987). Psychosocial resilience and protective mechanisms. American Journal of Orthopsychiatry, 57(3), 316–331.
Schils, N., & Pauwels, L. (2014). Explaining violent extremism for subgroups by gender and immigrant background, using SAT as a framework. Journal of Strategic Security, 7(3), 27–47.
Schils, N., & Pauwels, L. (2016). Political violence and the mediating role of violent extremist propensities. Journal of Strategic Security, 9(2), 70–91.
Schils, N., & Verhage, A. (2017). Understanding how and why young people enter radical or violent extremist groups. International Journal of Conflict and Violence, 11(1), 1–17.
Schmid, A. P. (2013). Radicalisation, de-radicalisation, counter-radicalisation: A conceptual discussion and literature review. ICCT Research Paper, 97(1).
Schwartz, S. J., Dunkel, C. S., & Waterman, A. S. (2009). Terrorism: An identity theory perspective. Studies in Conflict & Terrorism, 32(6), 537–559.
Seeman, T. (1996). Social ties and health: The benefits of social integration. Annals of Epidemiology, 6(5), 442–451.
Sieckelinck, S. M., & De Ruyter, D. J. (2009). Mad about ideals? Educating children to become reasonably passionate. Educational Theory, 59(2), 181–196.
Silke, A. (1998). Cheshire-cat logic: The recurring theme of terrorist abnormality in psychological research. Psychology, Crime and Law, 4(1), 51–69.
Silke, A. (2003). Becoming a terrorist. In A. Silke (Ed.), Terrorists, victims and society: Psychological perspectives on terrorism and its consequences. England: John Wiley & Sons.
Silke, A. (2008). Holy warriors: Exploring the psychological processes of jihadi radicalization. European Journal of Criminology, 5(1), 99–123.
Silke, A. (2019). The Study of Terrorism and Counterterrorism. In A. Silke (Ed.), Routledge Handbook of Terrorism and Counterterrorism. New York: Routledge.
Simi, P., Sporer, K., & Bubolz, B. (2016). Narratives of childhood adversity and adolescent misconduct as precursors to violent extremism: A life-course criminological approach. Journal of Research in Crime and Delinquency, 53(4), 536–563.
Slavin, R. E. (1995). Best evidence synthesis: An intelligent alternative to meta-analysis. Journal of Clinical Epidemiology, 48(1), 9–18.
Slootman, M., & Tillie, J. (2006). Processes of Radicalisation. Amsterdam: Institute for Migration and Ethnic Studies Universiteit van Amsterdam.
Souto, R. Q., Khanassov, V., Hong, Q. N., Bush, P. L., Vedel, I., & Pluye, P. (2015). Systematic mixed studies reviews: Updating results on the reliability and efficiency of the mixed methods appraisal tool. International Journal of Nursing Studies, 52(1), 500–501. https://doi.org/10.1016/j.ijnurstu.2014.08.010.
Steinberg, L., & Darling, N. (2017). Parenting Style as Context: An Integrative Model. In Interpersonal Development (pp. 161–170). London: Routledge.
Steinhausen, H.-C. (2006). Developmental psychopathology in adolescence: findings from a Swiss study—the NAPE Lecture 2005. Acta Psychiatrica Scandinavica, 113(1), 6–12. https://doi.org/10.1111/j.1600-0447.2005.00706.x.
Striegher, J.-L. (2015). Violent-Extremism: An Examination of a Definitional Dilemma. Presented at the proceedings of [the] 8th Australian security and intelligence conference, Edith Cowan University Joondalup Campus, Perth, Western Australia.
Tajfel, H. (1974). Social identity and intergroup behaviour. Information (International Social Science Council), 13(2), 65–93.
Turner, R. J. (1981). Social support as a contingency in psychological well-being. Journal of Health and Social Behavior, 22(4), 357–367.
Unicef. (1989). Convention on the Rights of the Child.
United Nation Development Programme (UNDP). (2018). “Frontlines—Young People at the Heart of Preventing Violent Extremism” —Excecutive Summary. United Nations Development Programme (UNDP). https://www.youth4peace.info/node/305.
Van San, M. (2015). Striving in the way of god: Justifying jihad by young belgian and dutch muslims. Studies in Conflict & Terrorism, 38(5), 328–342.
Van San, M., Sieckelinck, S., & de Winter, M. (2013). Ideals adrift: An educational approach to radicalization. Ethics and Education, 8(3), 276–289. https://doi.org/10.1080/17449642.2013.878100.
Venhaus, C. J. M. (2010). ‘Matt’. Why Youth Join al-Qaeda (No. Special report 236). Washington D.C. Retrieved March 23, 2018, from https://www.usip.org/publications/2010/05/why-youth-join-al-qaeda.
Williams, K. D. (2007). Ostracism. Annual Review of Psychology, 58, 425–452.
The author thanks Ask Elklit, Lau Lilleholt, the editor of Adolescent Research Review and one anonymous reviewer for insightful comments and input on early versions of this article.
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Harpviken, A.N. Psychological Vulnerabilities and Extremism Among Western Youth: A Literature Review. Adolescent Res Rev 5, 1–26 (2020). https://doi.org/10.1007/s40894-019-00108-y
- Psychological vulnerabilities
- Mental health