My research focuses on the application of a positive youth development paradigm to the design, implementation and evaluation of clinic- and community-based interventions focused on preventing multiple health risk behaviors during adolescence. I have recently served as principal investigator on three substantial programs of community-engaged intervention research: a randomized trial of a clinic-linked intervention focused on reducing risky sexual behaviors, violence involvement, and school failure among adolescent girls at high risk for early pregnancy; formative research and pilot testing of a culturally relevant teen-parent program to promote positive development and prevent risky sexual behaviors among Latino youth; and a school-based youth development intervention focused on preventing violence involvement and promoting school success among a multi-ethnic group of middle school students from resource-poor urban neighborhoods.