 Generalization of adolescents’ social experiences from the extracurricular to the school context 
Participation in extracurricular activities in high school is a promising avenue for promoting adolescents’ academic and psychosocial adjustment. However, few studies have delved into the processes explaining this link, specifically how social experiences in the context of these activities can generalize to the school context. The goal of this study was to test a multiple mediation model to verify (a) whether the satisfaction of the need for relatedness in the extracurricular activity predict the satisfaction of the need for relatedness in the school and (b) whether the sense of belonging towards the extracurricular activity predict the sense of belonging towards school and whether, in turn, these experiences at school are linked to adolescents’ intrinsic motivation and psychological well-being. A total of 123 adolescents (50 % girls) completed a questionnaire twice within the same school year. The results revealed that the sense of belonging adolescents develop within their extracurricular activities can extend to the broader school context, which in turn is associated with their intrinsic motivation towards school. Overall, this study highlights the importance for adolescents to nurture a sense of belonging towards their extracurricular activities.