The relationship between peers and delinquency has been taken as evidence for selection and socialization effects in the etiology of adolescents. Accumulating evidence suggests that both effects are involved. This study examines whether adolescents’ aggressive propensities and behaviors predict their peers (selection) and whether peers’ propensities and behaviors predict adolescents’ behaviors (socialization). The latent class growth analysis approach revealed three distinct subgroups: an early-onset group (0.9%); a late-peak group (3.37%); and a normative group (95.73%). Both selection and socialization effects were supported using a longitudinal Korean adolescent self-report. The results showed that adolescents with less self-control who are online more frequently and exhibit higher levels of traditional bullying and delinquency were more likely to be members of both the early-onset and late-peak groups compared with the normative group. Also, the aggressive behaviors fully mediated the link between aggressive propensities and delinquent peer associations. Furthermore, adolescents in the late-peak group (but not those in the early-onset group) were associated with a greater likelihood of online and offline delinquency, but cyberbullying and traditional bullying in late adolescence levels were high in both groups’ members.

同龄人与犯罪之间的关系已被证明是青少年病因学中选择和社会化影响的证据。越来越多的证据表明这两种作用都涉及。这项研究检查了青少年的攻击倾向和行为是否可以预测他们的同伴（选择），以及同伴的倾向和行为是否可以预测青少年的行为（社会化）。潜伏类增长分析方法揭示了三个不同的亚组：早发组（0.9％）；早发组（0.9％）。晚高峰组（3.37％）; 和一个规范性的小组（95.73％）。纵向韩国青少年自我报告支持选择和社会化效果。结果表明，与正常人相比，自我控制能力较弱的青少年在线上更为频繁，并表现出较高的传统欺凌和违法行为，它们更有可能成为早发和晚高峰组的成员。而且，侵略行为完全调节了侵略倾向和不良同伴之间的联系。此外，高峰后期组的青少年（而非早发组的青少年）与在线和离线犯罪的可能性更高，但是两组后期成员的网络欺凌和传统欺凌水平较高。攻击性行为完全调节了攻击性与不良同伴之间的联系。此外，高峰后期组的青少年（而非早发组的青少年）与在线和离线犯罪的可能性更高，但是两组后期成员的网络欺凌和传统欺凌水平较高。攻击性行为完全调节了攻击性与不良同伴之间的联系。此外，高峰后期组的青少年（而非早发组的青少年）与在线和离线犯罪的可能性更高，但是两组后期成员的网络欺凌和传统欺凌水平较高。