Paauglių klestėjimo skatinimas mokyklos aplinkoje: ilgalaikiai pozityvios jaunimo raidos intervencijos efektai ir poveikio mechanizmai
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The theoretical perspective of positive youth development (PYD) suggests that thriving people are the basis of strong communities and thriving societies (Lerner et al. 2003). The main aim of the current dissertation was to evaluate the efficacy of a positive youth development intervention and to reveal the mechanisms for promoting adolescents’ thriving. This longitudinal quasiexperimental study investigated 605 middle adolescents. The results revealed that the short-term school-based PYD intervention program evaluated in this study is an eligible tool for promoting positive youth development and thriving, as it has moderately strong positive effects on all five components of PYD (the Five Cs: competence, confidence, connection, character, caring) and contribution to the community. Also, it was found that promoting PYD brings multiple benefits for youth, as fostering the Five Cs is related to increased contribution to the community; decreased anxiety/depressiveness and aggressive behavior; increased intentional self-regulation and positive identity. Finally, the results support the conceptual model of PYD (Lerner, Lerner et al., 2005, 2012, 2015) and complements it with the following insights: (1) identity development is a mechanism through which positive youth development affects positive and negative developmental outcomes; (2) intentional self-regulation is a crucial factor in the PYD process, as it promotes positive identity and is promoted by the indicators of thriving.