Individualism and Collectivism as Moderators of Relations between Adverse Childhood Experiences and Adolescent Aggressive Behavior.

Adverse Childhood Experiences (ACEs) are generally associated with impaired life functioning, including mental health. Prevalent globally, ACEs' effects vary across cultural settings and groups. The present study assessed horizontal and vertical individualism and collectivism - key cultural dimensions - as moderators of ACEs' relations to adolescent aggressive behavior. The study was conducted in Vietnam, a Southeast Asian nation with high levels of collectivism but with levels of individualism increasing with globalization. The cross-sectional study included 644 high-school students (mean age = 16.6 years; 54% female). Self-report measures assessed ACEs, adolescent aggressive behavior, and individualism and collectivism. Given collectivism's focus on supporting one's social communities, it was hypothesized that collectivism would serve as a protective factor for statistical effects of ACEs on aggression. All four moderator analyses involving collectivism supported this hypothesis; i.e., at high levels of collectivism, relations between ACEs and aggression were significantly smaller than at low levels of collectivism. Statistical effects were largest for vertical (endorsing hierarchical power structures) collectivism. In the one significant individualism moderator analysis, individualism served as a risk factor for (i.e., increased) statistical effects of ACEs on proactive aggression. Results highlight the importance of the horizontal-vertical sub-dimensions, as they may provide for more precise theoretical explanatory and intervention models. For instance, concern for the power hierarchy's reactions (vertical collectivism) to one's aggression vs. concern for harm to one's groups (horizontal collectivism) by one's aggression have different implications for prevention and treatment that may be useful for maximizing interventions' effectiveness.