Harnessing peer influence: A summary and synthesis of social network and peer-led intervention research

This article synthesizes recent research on social network dynamics and peer-led interventions to address adolescent behaviors in five domains: bullying, internalizing problems, substance use, healthy lifestyles, and sexual behaviors. Social network studies highlight the role of peers in shaping norms, behaviors, and group dynamics. Peer-led interventions take advantage of these dynamics by training influential peers to promote positive behaviors and counteract maladaptive norms. Interventions such as ROOTS, ASSIST, and Sources of Strength demonstrate the potential of peer-led strategies to reduce bullying, substance use, and suicidal ideation. However, the effectiveness of such interventions varies and is often limited by inconsistent leadership, implementation challenges, and the age-dependent nature of peer influence. Successful interventions require strategic selection of leaders, establishment of critical mass and positive social norms, and integration with adult mentorship or systemic support. This synthesis highlights the need for cost-effective models that leverage peer influence to improve adolescent health and well-being, while addressing the challenges of scalability and sustainability.