Children with early-starting conduct problems have a very poor prognosis and exact a high cost to society. The Fast Track project is a multisite, collaborative research project investigating the efficacy of a comprehensive, long-term, multicomponent intervention designed to "prevent" the development of serious conduct problems in high-risk…

This study examines the effects of the Fast Track program, which is a multicomponent, intensive intervention for children with early-onset conduct problems and continues from 1st grade through high school. Prior research has shown that Fast Track produces small positive effect sizes on children's social and behavioral outcomes at the end of 1st…