My research adopts a multilevel approach to understanding peer victimization and aggression, including consideration of family context (e.g., parental psychopathology), peer relationships (e.g., low social status), individual behavior, and biobehavioral processes (e.g., psychophysiology). I take a developmental psychopathology approach in my research by emphasizing transactions and bidirectional associations across levels of analysis in order to understand developmental trajectories of typical and atypical functioning.