Abstract
Adolescence is a period of special significance for the development of personal and social values. Positive adolescent development (PYD) can be an ideal perspective from which to promote values in young people through their sports practice. The aim of the study was to adapt and analyse the measurement properties of the Values Scale for Positive Youth Development for use in the context of sport in young athletes. A total of 599 adolescents, competitors of different sports modalities, participated in the study. Confirmatory factor analysis and reliability and invariance analyses were performed. The results confirmed a good model fit, with adjustment indexes (CFI, GFI and AGFI) above 0.90 and error (RMSEA and SRMR) below 0.08. The factor loadings above 0.50 were obtained for all items. Adequate reliability of the scales was also confirmed, between 0.72 and 0.89, and gender, age and sport invariance were confirmed. In conclusion, the analysed scale is a valid and reliable instrument with adequate psychometric properties, which makes it an appropriate assessment tool to be used in sports contexts, based on the positive adolescent development approach.