Finally, the availability of only modest empirical evidence provides a compelling argument for evaluating potential predictors of each of the above-mentioned long-term follow-up outcomes based on a comprehensive battery of psychosocial (e.g., child, parent, and family adjustment) and biological (e.g., testosterone, cortisol) measures obtained upon study intake and treatment termination. Key predictors of treatment response include lower levels of child, parent, and family dysfunction, barriers to treatment, and SES (Kazdin, 1995; Kazdin & Wassell, 2000). We will also evaluate the role of contextual or other life changes in understanding treatment effects over the follow up period. Among the important contextual variables to be evaluated include changes in parental and family functioning, peer relationships, and school adjustment. Clearly, these variables may influence continued antisocial behavior at this young age. Thus, we will examine how contextual factors affect how well treatment effects hold as well as the real world impact of treatment on various life changes.