explained about 22% of the variance in aggressive behavior at Time 3, suggesting the importance of other risk factors in shaping adolescent aggressive behavior. In addition to the well-established social information processing deficits that have been shown to predict aggression, a variety of other genetic, neurobiological, environmental, and psychological factors are associated with aggressive behavior in adolescents (Dodge et al 1990, 1995; 2003; Crick and Dodge 1996; Guerra et al. 2003; Lansford et al. 2010; Weiss et al. 1992). Our findings suggest that, in addition to these previously established risk factors, emotion dysregulation should be included as an important determinant of a comprehensive developmental psychopathology model of adolescent aggression.