Selection and facilitation: Is the gang membership-psychopathic traits link a product of individual differences, social influences, or both?

Objectives: The issue of psychopathology among gang populations is controversial. Classic gang scholarship points to psychopathic traits as time-stable characteristics of those who join gangs, others argue gangs facilitate attitudes and behaviors endogenous to psychopathy, still others reject a gang-psychopathic traits link. Building off an interdisciplinary theoretical basis that adapts a tripartite theoretical model (i.e., selection, facilitation, and enhancement) on the gang membership-offending link (Thornberry et al. 1993) to the mixed positions on the gang membership-psychopathic traits relationship, this study tests selection and facilitation models. Methods: Using longitudinal data from Pathways to Desistance, I examine whether psychopathic traits are an antecedent and/or consequence of gang membership. Specifically, I test whether (1) there are between individual differences in psychopathic traits that contribute to selection into gangs and (2) gangs facilitate within-individual change in psychopathic traits among their members. Results: The findings suggest that the enhancement model (i.e., both selection and facilitation) best represents the relationship between gang membership and psychopathic traits. Conclusions: Analyzing the role of individual propensities—like psychopathic traits—and social-environmental influences—like gang membership—is critical for understanding crime and criminality. This study demonstrates that these factors do not operate in isolation but instead interact bidirectionally. By moving beyond the selection-facilitation dichotomy, this study contributes to a more integrated framework for explaining problem behaviors and helps establish best practices for prevention and rehabilitation.