The current study examined school variations in academic engagement norms and whether such norms affect those most susceptible to peer influence. We presumed that behaviors associated with perceived popularity make norms salient and are most likely to affect socially marginalized (rejected) youth. Focusing on differences across 26 middle schools,…

The current study examines how gender discrimination by adults in school is linked with depressive symptoms and sleep duration over time in middle school. The main goal is to test one psychological mechanism that can account for such associations: perceived school unfairness. Relying on a racially-ethnically diverse sample of girls (N = 2,718,…

The current study examines whether peer victimization experienced in early adolescence is associated with compromised social functioning 14 years later in young adulthood. The sample involved 1533 young adults (65.1% female, M[subscript age] = 27.06) who had participated in a large research project as middle school students (7th and 8th graders,…

Although high-quality friendships are presumed to protect peer-victimized adolescents from distress, evidence supporting this claim is mixed. This study investigated whether the protective function of high-quality best friendships for victimized youth varies depending on adolescents' perceptions of their best friend's victimization. Among a sample…

Academic achievement disparities based on parental education are robust during the middle school years. The current study examined whether cross-class friendship (i.e., reciprocal relationships between peers with different levels of parental education) decrease class-based achievement differences during a developmental phase when friends are…

The current study was designed to examine one possible weight stigma-reduction mechanism: school-level weight diversity. It was hypothesized that greater weight diversity among same-sex peers at school would attenuate the negative association between weight and academic achievement. Across 26 urban public middle schools, 5,991 sixth-grade students…

Although research has shown that peer victimization is related to negative school outcomes, whether ethnic ingroup size alters victimization-adjustment links is unclear. This study examines whether smaller ethnic ingroup representation amplifies the negative associations between peer victimization and school adjustment. We also examine whether…

The effects of school-based ethnic diversity on student well-being and race-related views were examined during the first year in middle school. To capture the dynamic nature of ethnic exposure, diversity was assessed both at the school-level (n = 26) and based on academic course enrollments of African American, Asian, Latino, and White students…