Introduction: Adolescence is the most critical life period for the development of eating disorder symptomatology. Although problems in identity functioning and emotion dysregulation have been proven important risk and maintaining factors of ED symptomatology, they have never been integrated in a longitudinal study.Methods: The present study is part of the Longitudinal Identity research in Adolescence -study and aimed to uncover the temporal interplay between identity functioning, cognitive emotion regulation, and ED symptomatology in adolescence. A total of 2,162 community adolescents participated (...) at three measurement points with 1-year intervals. They reported on identity functioning, cognitive emotion regulation, and ED symptomatology.Results: Cross-lagged paths could be fixed for boys and girls and showed bidirectional associations between both dimensions of identity functioning and both rumination and catastrophizing over time. Similarly, these maladaptive cognitive emotion regulation strategies were bidirectionally related to ED symptomatology over time. Finally, indirect pathways pointed to bidirectional associations between both dimensions of identity functioning and bulimia symptoms through rumination and catastrophizing. Only unidirectional associations emerged for drive for thinness and almost no cross-lagged associations were found with positive reappraisal.Conclusion: The present study demonstrates that identity confusion may contribute to the development of ED symptomatology in adolescence through cognitive emotion dysregulation. It also reveals that these ED symptoms hamper identity development through emotion dysregulation. These results stress the importance of targeting both identity functioning and cognitive emotion regulation in the prevention and intervention of ED symptoms. (shrink)

Departing from the model suggested by Luyckx, Schwarz, Berzonsky et al., the relationships between identity and educational context, social participation, and identity information processing style were investigated. Participants were 972 students from six vocational schools in Poznań. The students, within these six schools, attended Grades I-III of three types of vocational schools: basic vocational schools, technical upper secondary schools, and specialized upper secondary schools. Three questionnaires were used: The Dimensions of Identity Development Scale, which measures five identity dimensions according to (...) the concept of Luyckx, Schwarz, Berzonsky et al., Social Participation Questionnaire, developed by Brzezińska, Rękosiewicz and Hejmanowski, enabling identification of the type of social participation, and the Polish adaptation of M. Berzonsky’s Identity Style Inventory 4 authored by A. Senejko, to examine identity styles. The results showed that the students from basic vocational schools and technical upper secondary schools were more often characterized by the normative identity style, whereas the students from specialized upper secondary schools manifested a greater tendency to engage themselves in exploration, both adaptive and ruminative. (shrink)