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This study investigated the effects of proximal and distal constructs on adolescent's academic achievement through self-efficacy. Participants included 482 ninth- and tenth- grade Norwegian students who completed a questionnaire designed to assess school-goal orientations, organizational citizenship behavior, academic self-efficacy, and academic achievement. The results of a bootstrapping technique used to analyze relationships between the constructs indicated that school-goal orientations and organizational citizenship predicted academic self-efficacy. Furthermore, school-goal orientation, organizational citizenship, and academic self-efficacy explained 46% of the variance in academic achievement. Mediation analyses revealed that academic self-efficacy mediated the effects of perceived task goal structure, perceived ability structure, civic virtue, and sportsmanship on adolescents' academic achievements. The results are discussed in reference to current scholarship, including theories underlying our hypothesis. Practical implications and directions for future research are suggested.

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Young people perceive loneliness as a distressing emotional experience associated with sadness and boredom. Also, feelings of loneliness may be associated with psychosocial and emotional problems during adolescence. The aim of this study was to investigate whether perceived social competence mediated the cross-sectional relationship between sport participation and loneliness in young people when controlling for age, sex, shyness, and non-organized physical activity. This cross-sectional study consisted of 2,055 pupils (995 boys and 1,060 girls) from 38 schools in Norway, with a mean age of 15.3 years. In addition to normal theory regression procedures, bootstrapping techniques were used to test the hypothesized indirect effect. Findings revealed that sport participation was inversely associated with loneliness mediated by perceived social competence. This indirect effect was evident when controlling for age, sex, non-organized physical activity and shyness. Findings suggest that sport participation during adolescence is indirectly associated with lower level of loneliness through higher level of perceived social competence. One may argue that sport participation during adolescence can contain important social components that help meet young peoples' social needs and expectations, which in turn may prevent feelings of loneliness.

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