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To better address the many consequences of peer victimization, research must identify not only aspects of individuals that put them at risk for victimization, such as aggression, but also aspects of the context that influence the extent of that risk. To this end, this study examined the contextual influences of gender, same-sex peer group norms of physical and relational aggression, and nationality on the associations of physical and relational aggression with peer victimization in early adolescents from Canada, China, Brazil, and Colombia (N = 865; M[subscript age] = 11.01, SD = 1.24; 55% boys). Structural equation modeling was used to test for measurement invariance of the latent constructs. Multilevel modeling revealed that both forms of aggression were positive predictors of peer victimization, but physical aggression was a stronger predictor for girls than boys. Cross-national differences emerged in levels of peer victimization, such that levels were highest in Brazil and lowest in Colombia. Cross-national differences were also evidenced in the relationship between relational aggression and victimization: the relationship was positive in China, Brazil, and Canada (listed in descending order of magnitude), but negative in Colombia. Above and beyond the cross-national differences, physical aggression was a stronger predictor of victimization in peer groups low in physical aggression, and relational aggression was a stronger predictor in peer groups low in relational aggression. Ultimately, this research is intended to contribute to a better theoretical understanding of risk factors for peer victimization and the development of more effective and culturally-appropriate prevention and intervention efforts.

Previous studies have demonstrated that several contextual factors influence the relationship between aggression and peer victimization in early adolescence, including gender of the same-sex peer group and gender composition of the school. The current study replicated and expanded on this research by examining the moderating influences of gender of the same-sex peer group, same-sex peer group norms, and classroom gender composition in a sample of early adolescents from Barranquilla, Colombia. Multilevel modeling analyses indicated that both relational and physical aggression were positive predictors of peer victimization. Relationally aggressive girls were at a lower risk for victimization while physically aggressive girls were at a higher risk. Relational aggression was a weaker predictor in classes with a larger proportion of girls. Additionally, relational aggression was a weaker predictor in same-sex peer groups with a greater prevalence of relational aggression. These findings provide further evidence of multiple forms of contextual influence on social behavior. Practical implications for these findings are also provided.

The main purpose of the study was to examine the moderating role of the insecure mother-child attachment in the relations between social withdraw and peer difficulties. Participants were 487 urban children (247 boys, 240 girls) in elementary schools in Shanghai, the People's Republic of China. Data on attachment-relevant coping styles in insecure relationships with mother were collected from children's self-reports. Information concerning social withdrawal (i.e., shyness and unsociability) and peer difficulties (i.e., peer victimization and rejection) was obtained from peer nomination. Among the results, both shyness and unsociability were positively related to peer victimization and rejection. However, several interaction effects were also observed. Both avoidant and ambivalent attachment served an exacerbating role for peer difficulties for shy and unsociable children, with these patterns differing by gender. Implications for the contributions of attachment to socially withdrawn children's peer adjustment are discussed.

This study examined the relationship between social withdrawal (isolation and unsociability) and peer victimization by exploring the moderating influences of gender, classroom norms of social withdrawal, individualism, and collectivism. One hundred fifty-eight adolescents (M[subscript age] = 14.11, SD = 1.10; 46.3% boys) in 7th and 8th grade from Curitiba, Brazil, completed peer assessments of isolation, unsociability, peer victimization, and self-reports of classroom individualism and collectivism. Isolation and unsociability were aggregated into classroom norms. Data were analyzed using multilevel modeling. Isolation and unsociability positively predicted victimization. Unsociability was a positive predictor of victimization in low-unsociability classrooms. Isolation was negatively associated with victimization in low-isolation classes. The relationship between isolation and victimization was weaker in more collectivistic classes. The relationship between unsociability and peer victimization was strongest among boys in classes low in individualism. This study provides further support that social withdrawal has consequences for adolescents' socioemotional development which vary by classroom context.