The association between classroom proportion of boys and academic achievement in a Confucian cultural context

Objectives This study examined whether the classroom proportion of boys is associated with students' academic outcomes in a Confucian cultural context and whether sensitivity to external evaluation provides a culturally embedded motivational pathway linking classroom gender composition to achievement. Methods Using data from the China Education Panel Survey, we analyzed 18,244 seventh- and ninth-grade students nested in 438 classrooms across 112 Chinese schools. Academic outcomes were measured using cognitive ability 3PL scores and ordered academic expectations. We estimated OLS and ordered logit models with individual- and family-level covariates. Propensity Score Matching was used to assess robustness to potential selection bias, and structural equation modeling tested the potential mediating role of sensitivity to external evaluation. Results A higher classroom proportion of boys was significantly and negatively associated with cognitive ability and academic expectations, and these associations remained robust after matching. Structural equation models suggested that a higher proportion of boys was associated with lower sensitivity to external evaluation, whereas sensitivity to external evaluation was positively associated with both outcomes, indicating a potential partial mediating pathway. Heterogeneity analyses showed stronger negative associations among boys than girls. By grade, the association with cognitive ability was stronger among seventh-grade students, whereas the association with academic expectations was significant in both grades and slightly stronger among ninth-grade students. Conclusions These findings extend gender peer-effects research by identifying a culturally embedded motivational mechanism. In Confucian classrooms, sensitivity to external evaluation may function as a form of informal social control that constrains social loafing rather than merely as controlled motivation.