Bystanders to Prevent Peer Sexual Violence: Understanding Patterns of Prosocial Behavior Over Time from Early to Later Adolescence

Programs to prevent peer sexual violence that encourage positive bystander intervention are proliferating. Yet, little is known about how these prosocial behaviors unfold over time across middle to later adolescence. The current study examined helpful bystander actions over three years among students in grades 7–10 (mean age 13.7, range 12–18) at baseline (N = 2539, 53.2% girls). Surveys assessed bystander behavior, social norms, and use of...