Developmental Cascades Linking Academic Achievement, Prosocial Behavior, Peer Relationships and Teacher-Student Relationships in Chinese Early Adolescents.

Children's academic achievement plays a central role in shaping their educational trajectories and social development. While extensive research has shown that prosocial behavior and interpersonal relationships with teachers and peers are significantly associated with children's academic achievement, most studies have relied on cross-sectional designs, and the few existing longitudinal studies have examined these associations only in a piecemeal manner, limiting understanding of the developmental cascades that link academic, behavioral, and interpersonal domains as an interconnected system. To address this gap, the present longitudinal study investigates the bidirectional relations among academic achievement, prosocial behavior, peer relationships, and teacher-student relationships at the within-person level in Chinese elementary school children. The sample consisted of 3,132 children in Grades 3 and 4 (45.9% girls; Mean age = 9.88 years, SD = 0.72), who were assessed across five waves over a two-year period, with each wave spaced six months apart. Academic achievement was measured using end-of-term exam scores. Prosocial behavior, peer relationships, and teacher-student relationships were assessed through self-reports. The results of the random-intercept cross-lagged panel model indicated that higher academic achievement significantly predicted subsequent increases in prosocial behavior and teacher-student relationships. Conversely, higher prosocial behavior at one time point predicted subsequent increases in peer relationships and academic achievement. Positive peer relationships were associated with later increases in academic achievement, prosocial behavior, and teacher-student relationships. Similarly, more positive teacher-student relationships predicted subsequent increases in prosocial behavior and peer relationships. These findings support a developmental cascade perspective by showing that children's academic, behavioral, and interpersonal adjustment develop as interconnected processes rather than as isolated domains, with changes in one domain carrying implications for subsequent adjustment in other domains.