“…They are assumed to positively affect subjective well-being as they involve challenge and concentration, are intrinsically motivated, and contribute to the development of adolescents' skills (Kleiber, Larson, & Csikszentmihalyi, 1986). Unstructured activities (e.g., watching TV or socializing with friends) may have maladaptive consequences in terms of subjective well-being, as they have been related to substance use (Trainor et al, 2010), aggression, delinquency, and susceptibility to peer pressure (Flannery, Williams, & Vazsonyi, 1999). Nevertheless, unstructured activities may provide relaxation and recovery of energy necessary for challenging structured activities (e.g.…”