This longitudinal study investigated how changes in peer victimization were associated with changes in internalizing symptoms among 662 adolescents across a 4-year period. The moderating effects of initial levels of father, mother, and friend emotional support on this association were also examined. Gender and age group differences (early adolescent group aged 12-15 years; late adolescent group aged 16-18 years) were tested. Increases in physical and relational victimization were related to increases in internalizing symptoms. Friend emotional support was more protective in reducing internalizing symptoms for adolescent males than adolescent females in both the early and late adolescent groups. Gender differences also moderated the effects of mother and father emotional support.Internalizing problems including depression and anxiety affect approximately 10% to 20% of youth (Brendgen, Wanner, Morin, & Vitaro, 2005;Letcher, Smart, Sanson, & Toumbourou, 2009). However, the patterns of changes in internalizing symptoms from late adolescence into early adulthood are not clear. Epidemiological research on the incidence of psychiatric disorders in the transition from adolescence to adulthood shows increases in some anxiety disorders such as panic and agoraphobia (Costello, Copeland, & Angold, 2011). Some studies also show increases in depressive symptoms and in new cases of depressive disorders from mid-to late-adolescence followed by decreases from adolescence into adulthood (Hale, Raaijmakers, Muris, van Hoof, & Meeus, 2008;Montague, Cavendish, Enders, & Dietz, 2010;Needham, 2008;Pettit, Lewinsohn, Seeley, Roberts, & Yaroslavsky, 2010). However, other research reports that rates of depressive symptoms increase from midto late-adolescence but remain stable from late adolescence into early adulthood (Hankin et al., 1998). Gender differences in these trajectories from adolescence to young adulthood have also been found showing increases in depressive symptoms across the transition to young adulthood for adolescent males, but not adolescent females (Leadbeater, Thompson, & Gruppuso, 2012).Efforts to understand the contexts that create risks for or protect against increases in internalizing symptoms or accelerate declines are needed to improve our understanding of individual differences in these patterns of change. In this study, we examine the effect of
CIHR Author ManuscriptCIHR Author Manuscript CIHR Author Manuscript peer victimization on internalizing symptoms (including anxiety and depression) as well as the moderating effects of friend and parent emotional support among early and late adolescents across a 4-year period.Research consistently shows that peer victimization, the experience of being a target of a peer's bullying and aggressive behavior, is associated with increases in internalizing symptoms in children and in adolescents (Reijntjes, Kamphuis, Prinzie, & Telch, 2010;Rudolph, Troop-Gordon, Hessel, & Schmidt, 2011;Stadler, Feifel, Rohrmann, Vermeiren, & Poustka, 2010;Ttofi, Farrington, Lösel, & Lo...