Abstract
The aim of this study was to analyze the reciprocal effects between prosociality, peer support and psychological well-being using a four-wave longitudinal study and a within-person analytical approach (random intercept cross-lagged panel model, RI-CLPM). A sample of 587 adolescents (males = 308; M(age) = 14.23, SD = 0.58) enrolled in the first year of high school (9th grade) were recruited and followed over four years from 2016 (Time 1 [T1]) to 2019 (Time 4 [T4]). Once a year, they filled in a questionnaire measuring prosociality, peer support, and psychological well-being. The results from the RI-CLPM revealed that, at the between-person level, prosociality, peer support and psychological well-being were all positively associated. Conversely, at the within-person level and at all survey points, only psychological well-being positively predicted prosociality one year later. Specifically, we found that adolescents with higher levels of psychological well-being were more likely to show a tendency for prosocial behaviors over time. Promoting interventions aimed at enhancing psychological well-being may make adolescents more likely to engage in positive behaviors, such as prosocial ones, in a variety of contexts, thereby creating favorable social environments.