His primary area of research is in the Clinical/Community and Social-Personality-Organizational divisions. His research interests fall into three general categories. First, he is interested in understanding and intervening with adolescents at high risk for the development of socio-emotional problems. Second, he is interested in understanding the conceptualization and treatment of these high-risk youth in the legal and mental health systems. Third, he is interested in developing new analytic approaches for the study of developmental data.