نبذة مختصرة : Responsible behavior is one of the indicators of a healthy human and its strengthening and growth will not be possible except by identifying the factors affecting responsible behavior. To this end, the present study seeks to answer the question of whether family performance, psychological capital and satisfaction of psychological needs of adolescents influence their level of responsibility and mental vitality or not? Aims: The present study was conducted with the aim of family performance, psychological capital, psychological needs with mental vitality: the mediating role of adolescents' responsibility during adolescence. Methods: The present study was descriptive, with correlation and structural equations. The statistical population of this study consisted of all adolescents aged 14 to 18 years in Tehran in 1399. The the research sample was 400 adolescents in districts 1 and 2 of Tehran who were selected by multi-stage cluster sampling. Research data was collected using the self-report questionnaire of Kim and Kim family (2007), psychological needs of Lagourdia et al. (2002), McGee (2011), Soroush (2012) and the mental vitality of Kiyez et al. 2003). Data were analyzed using the Pearson correlation coefficient and structural equation modeling.
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