Disentangling between‐ and within‐person associations between empathy and prosocial behaviours during early adolescence

Although empathy has been found to be related to prosocial behaviour, little is known about the longitudinal links between these two concepts during early adolescence, a unique window into developmental changes on empathy and prosocial behaviour considering the physical, cognitive, socio-emotional and contextual changes occurring during this period. Even though changes in adolescent empathy have been associated to changes in adolescent prosocial behaviour, studies examining this link on the within-person level are lacking. The present study investigated the within-adolescents longitudinal relations among empathy and prosocial behaviour.383 French adolescents (MageT1 = 12.15, 50.4% male) reported on their empathy and prosocial behaviour each year across three years. In order to disentangle between-adolescent differences from within-adolescent processes, Random-Intercept Cross-Lagged Panel Models were applied.At the between-person level, there was a strong positive association between empathy and prosocial behaviour. At the within-person level, adolescents who reported more empathy than usual reported higher than usual prosocial behaviour one year later.Adolescents with higher empathy compared to their peers tended to be those who reported higher prosocial behaviour. Changes in empathy within-adolescents were related to later within-adolescents' change in prosocial behaviour.