Abstract
The article describes the result of a constative and formative research on well-being in adolescents, an important theme in contemporary psychology. The constative research included 80 adolescents, while the formative one, focused on 20 adolescents with low and moderate level of well-being. The following questionnaire were administrated to the entire sample of adolescent: WHO well-being questionnaire, Oxford happiness inventory and the Freiburg Personality Inventory (HB- form). The result revealed some significant facts that define the manifestation of well-being during adolescence: a significative number of adolescents show low and moderate levels of well-being. Well-being in adolescents is correlated with certain personality traits: a high level of well-being is associated with high extraversion – introversion and masculinity – femininity, ad low levels of neuroticism, depression emotionality, inhibition and emotional instability. Well-being in adolescents can be developed through a psychological intervention program. Adolescents who participated in the well-being enhancement program showed improvements in their well-being.

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