This study examined peer predictors of variation and growth in depressed mood among high-risk adolescents, using child and parent reports of monthly symptoms. One hundred seventy-six parents and their 10-to 14-year-old children separately took part in a series of up to nine monthly interviews. Multilevel growth models examined both time-varying peer predictors of parent and child reports of the child's depressive symptoms, controlling for age, gender, and treatment status. Deviant peer affiliation significantly predicted elevated depressive symptoms in the monthly child-report of depressed mood, especially for younger adolescents. Children's level of delinquency was significantly related to parent-reported depressive symptoms, and to child-reported symptoms in older adolescents only. As expected, depressed mood was higher for girls and more prevalent among older adolescents. The results suggest that peer processes may be linked in time to the development of depression, especially among high-risk adolescents.In light of the number of children and adolescents who experience clinically significant depression, with the associated serious long-term implications for later functioning (e.g., Fergusson & Woodward, 2002;Lewinsohn, Rohde, Seeley, Klein, & Gotlib, 2003), the search for specific, modifiable risk factors has been central to research in development and psychopathology. In the effort to design effective prevention and intervention strategies, additional studies are needed that examine multivariate models of the developmental trajectories of depressive symptoms across adolescence. Although a number of studies have focused on individual or family predictors of depressive symptoms, research on peer-relational processes in the development of internalizing problems across childhood and adolescence received much less attention (Deater-Deckard, 2001). The limited body of research on peer processes in depression stands in stark contrast to the robust literature on peer processes predicting conduct problems in youth. Research on peer influences on the development of conduct problems in childhood and adolescence has documented the importance of developmental pathways from early peer rejection to increased affiliation with deviant peer groups in supporting the increase in children's conduct problems (including aggression, criminal behavior, and drug use) across early development (Dishion, 2000;Dishion, French, & Patterson, 1995). In light of the importance of interpersonal/interactional models of depression (see Joiner & Coyne, 1999), this gap in the corresponding literature related to depression in youth marks a serious oversight.The role of peers in depressed mood or disorder may be especially salient in early adolescence. In early adolescence, children spend increasing amounts of time with peers, such that peer-
NIH-PA Author ManuscriptNIH-PA Author Manuscript NIH-PA Author Manuscript group relations are likely to play an increasingly central role in shaping their affective experiences and social trajectories...