This research investigated whether classroom-based peer norms for achievement goals moderate friendship selection, maintenance and influence processes related to academic achievement in 46 Grade 5 and Grade 6 classrooms (N = 901, 58.7% Grade 5 students, 48.5% boys). A distinction was made between peer norms for mastery (i.e., developing…

This study examined the longitudinal and bidirectional relations between same-sex (SS) and other-sex (OS) popularity and preference across one school year. Participants were 271 sixth-grade students who completed peer nomination measures at three time points in their schools. Tests of cross-lagged autoregressive models indicated that SS popularity…

This study investigated the associations among peer status, friendship jealousy, and relational aggression in early adolescence, with a focus on peer status as a moderator of the association between relational aggression and friendship jealousy. Three hundred eighteen sixth-, seventh-, and eighth-grade students completed a sociometric assessment…

Victimization has been primarily studied within the broader peer group, leaving other potentially important contexts, such as friendship cliques, unexplored. This study examined the role of popularity in identifying protective factors that buffer against victimization within early adolescents' (N = 387) friendship cliques. Previously identified…

The present study examined influences of sixth-grade student-reported parent educational involvement on early adolescent peer group affiliations at seventh and eighth grade. In addition, student gender and ethnicity were explored as possible moderators. Drawn from a large effectiveness trial, participants in this study were 5,802 early adolescents…

This study focused on the joint effects of teachers and peer groups as predictors of change in students' engagement during the first year of middle school, when the importance of peer relationships normatively increases and the quality of teacher-student relationships typically declines. To explore cumulative and contextualized joint effects, the…

Two studies examined when and why children (10-13 years) help ethnic in-group and out-group peers. In Study 1 (n = 163) children could help an out-group or in-group peer with a word-guessing game by entering codes into a computer. While children evaluated the out-group more negatively than the in-group, they helped out-group peers "more"…

The study addresses the social participation of integrated students with special educational needs (SEN) in upper primary regular classes in Greece alongside their perceptions of best friend quality. Social participation was defined as consisting of four key dimensions: students' acceptance by classmates, friendships, social self-perceptions, and…

The present study examined the effects of teacher attunement to victimization on student perceptions of the bullying culture of their schools as a means of fostering a sense of belonging among early adolescents. Participants (n = 1,264) in sixth grade reported on the frequency that they had been bullied, and teachers were asked to report students…

The present study examined the effects of teacher attunement to victimization on student perceptions of the bullying culture of their schools as a means of fostering a sense of belonging among early adolescents. Participants (n = 1,264) in sixth grade reported on the frequency that they had been bullied, and teachers were asked to report students…

This study examines the effects of peer victimization by verbal, physical, and relational bullying on Korean adolescents' self-worth, disconnect to peers, school engagement, and academic achievement. A two-year longitudinal survey on 3,266 sixth-graders attending school in Seoul, Korea was used. Multivariate regression results controlling for…

This study examined aspects of peer clique participation that mitigated victimization by peers over a school year. Participants were 1,033 children age 8-14 years (M[subscript age] = 11.81; 444 boys and 589 girls), including 128 (66 boys) victimized children. Cliques (N = 162) and clique participation were assessed by using the Social Cognitive…

The goal of the current investigation was to test emotion dysregulation as a mechanism explaining the longitudinal association between peer rejection and depressive symptoms across 1 school year in middle childhood and to determine whether this process differed based on gender and grade. Youth in Grades 3 through 6 (N = 131; 71 girls) and their…

The indirect effects of moral disengagement about cyberbullying and parental monitoring on traditional victimization and bullying via cyberbullying involvement were examined in a diverse sample of 800 youth in Grades 3 to 8. After controlling for grade and gender, moral disengagement about cyberbullying and parental monitoring had an indirect…

This paper evaluates the influence of the classmates' age on individual academic achievement. The identification strategy explores a mechanism for the division of classes based on age homogeneity, with cutoff value determined by the Brazilian law of age at school entry. Fuzzy regression discontinuity estimates a local average treatment effect of…