A Social Process Model of forms of aggression and victimization and internalizing problems

Using one-year longitudinal data, the present study examined the association between forms of aggression and internalizing problems and whether peer rejection and victimization mediated this association among Taiwanese children. Participants in the current study were 269 fourth and fifth graders (51% boys and 49% girls; M age = 10.02 for boys and 9.99 for girls, at the first time point) from four public elementary schools in northern Taiwan. Data was collected at three time points during one calendar year, six months apart (fall of grades 4 and 5, spring of grades 4 and 5, fall of grades 5 and 6). Serial mediation models were tested in which independent variables were forms of aggression (relational and physical), mediators were peer rejection and forms of peer victimization (relational and physical), and dependent variables were internalizing problems. Results indicated that peer rejection and relational victimization, in that order, mediated the association between relational aggression and internalizing problems, while controlling for gender (serial mediation: relational aggression → peer rejection → relational victimization → internalizing problems). In contrast, the results did not support the mediation or indirect effect of physical aggression on internalizing problems through peer rejection and physical victimization. However, physical aggression directly predicted internalizing problems during one school year. These differences in the pathways from each form of aggression to internalizing problems via peer rejection and forms of peer victimization suggest the need for differentiated intervention and prevention programs for at-risk youth with forms of aggression and victimization in Taiwanese schools.