Peer influence and adolescent nonsuicidal self-injury: A theoretical review of mechanisms and moderators

Nonsuicidal self-injury (NSSI) is an increasingly prevalent health risk behavior among adolescents and represents a significant public health concern. Although researchers have identified numerous antecedents or risk factors that precede engagement in NSSI behaviors, few studies have examined the role of peer influence processes. Yet, recent research suggests that adolescents may be more likely to engage in NSSI when close friends or other peers engage in similar behaviors. The following paper reviews past research on peer influence effects, including potential mechanisms and moderating variables. Methodological considerations for future research on peer influence and NSSI are discussed.