Introduction. Socialization activities of parents not only contribute to the development of the social-cultural and psychological sphere of the child, but also may shape the child’s skills that constitute competencies. It was decided to check which of the models of socialization used by parents affect the growth of competencies in youth at an older school age. Aim. The aim of the article is to determine a model of prediction of competences of adolescents at an older school age due to the socialization models used by their parents. Methods. The research was conducted in public primary schools in eastern Mazovia, after the first period of the pandemic. 166 students in the sixth, seventh, and eighth grades were analysed. The diagnostic survey method was used, the technique was a questionnaire, on the basis of which two research tools were constructed. The first research tool determined the type and degree of parents’ use of the socialization model; the second tool was a self-reported scale and was used to determine students’ cognitive, communication, social, and moral skills. Results. As a result, two models of socialization were found to be predictors of increased competence: complete freedom, and the conflict model. The level of competence of older school-age adolescents increases by almost 7% if their parents use the complete freedom model in the socialization process and do not use the conflict model in socialization relationships.