Self-Regulation and Rumination as a Transdiagnostic Factors for Internalizing and Externalizing Disorders Among Adolescents.

Objective: Internalizing and externalizing disorders are developmentally complex entities with multifactorial pathogenesis. The findings from recent research on the transdiagnostic responsibility of self-regulation and rumination suggest that their deficits underlie all psychiatric disorders in adults, and yet only a small number of studies have been conducted on the population of adolescents. Method: The clinical study included 162 adolescents, divided into two clinical groups, treated in the Department of Child and Adolescent Psychiatry in Hospital. The first clinical group consisted of 91 adolescents with internalizing mental disorders, with the second clinical group consisting of 71 adolescents with externalizing mental disorders. They had been referred for psychodiagnostic assessment after their first psychiatric examination, and were diagnosed according to the International Classification of Diseases (ICD-)10 criteria, the diagnoses confirmed through structured clinical interviews. They additionally met the inclusion and exclusion criteria for participating in this study. Results: The results suggest that self-regulation significantly and negatively predicted symptoms of mental disorder in both clinical groups, and rumination significantly predicted symptoms of anxiety and depression in the group of adolescents suffering from internalizing disorders. Conclusions: The findings emphasize the importance of maladaptive self-regulation as a transdiagnostic factor underlying various forms of psychopathology in adolescents, and the importance of rumination as a unique transdiagnostic process related to different disorders in the internalizing dimension.