My research focuses on determining biological mechanisms that contribute to the expression and development of externalizing behavior in adolescence. I am particularly interested in understanding the biological, environmental, and developmental influences on the emergence, persistence, and desistance of antisocial behavior and substance use in adolescence and early adulthood. Towards this end, I incorporate a broad range of methods to better understand this phenotypic expression. I am also trained as a clinical psychologist and am interested in translating these mechanistic findings into clinically relevant measures or interventions for at-risk youth.