By Julie Emmelkamp, Jessica J. Asscher, Inge B. Wissink, Geert Jan J.M. Stams

Juveniles who become radicalized pose a great threat for society. Although research on radicalization is accumulating, a quantitative review of risk factors for youth radicalization is lacking. Therefore, a series of metaanalyses were conducted on k = 30 studies (247 effect sizes) to examine risk factors for radicalization in youth, yielding significant effects for 15 out of 17 risk domains, ranging in magnitude from r = 0.080 to r = 0.482. Medium positive effects were found for activism, perceived in-group superiority and perceived distance to other people, while small effects were found for gender, personality, delinquency and aggression, lower educational level, negative peers, in-group identification, perceived discrimination, perceived group threat, perceived procedural injustice, perceived illegitimacy of authorities, and other, whereas the effect for poverty was very small. Moderator analyses showed that the risks of negative parenting and societal disconnection were smaller for right-wing radicalization than for religious or unspecified radicalization. The risks of personality and perceived group threat were greater for willingness to carry out extremist acts and extremist behavior than for attitude towards radicalization. Further, when the percentage of ethnic minorities in the sample increased, the risks of personality, negative parenting, and societal disconnection for radicalization were larger.

Aggression and Violent Behavior, 55, [101489].