This study focuses on the differentiation process, involving the emergence of a distinction between parents' own personal values and their socialization values (the values they want their children to adopt), and on the contribution of children's values to their parents' socialization values. Measures of personal and socialization values were administrated to 603 Israeli adolescents and their parents. As we hypothesized, parents differentiate between their personal values and their socialization values. Moreover, adolescents' values had a specific contribution to their parents' socialization values. These findings provide new support to the notion that the socialization process should be considered as the result of the interaction between parents and their adolescent children rather than as a unidirectional process affected by parents alone.