Identity Diffusion as the Organizing Principle of Borderline Personality Traits in Adolescents-A Non-clinical Study

Growing evidence shows that diagnosing and treating borderline personality disorder (BPD) is of high relevance for affected youths. Although identity crisis is part of the normative developmental process, identity diffusion is a potential candidate for being an appropriate concept in further developing screening tools and interventions for BPD treatment in adolescence. We hypothesized that severity of borderline traits (as indicated by the strength of their associations with identity diffusion) would be negatively associated with non-clinical adolescents' endorsement of borderline features' presence. We also hypothesized that identity diffusion had a central role in the network of borderline personality traits and could be conceived of as a latent organizing principle of borderline personality disorder. In our study, 169 non-clinical adolescents (81 girls and 88 boys; M _age = 15.38; SD_age = 1.52) filled out self-report measures of borderline personality features and identity diffusion. According to our results, having strong feelings and interpersonal sensitivity were the two most endorsed borderline personality features. Borderline personality features were positively correlated with identity diffusion. The more severe a borderline personality feature was, the less relevant it was for non-clinical adolescents. According to a network analysis, identity diffusion was the most central and least redundant element of the network of borderline personality traits. Results are discussed from a clinical point of view, further encouraging professionals to use identity diffusion screening tools to detect BPD in adolescence.

Borderline Personality Disorder and Disordered Eating Behaviour: The Mediating Role of Rejection Sensitivity

OBJECTIVE

To examine the relationship between disordered eating behaviour and Borderline Personality Disorder (BPD) in a clinical population of adolescent girls. We hypothesized that BPD and disordered eating would be strongly associated and that this association would be partially mediated by rejection sensitivity.

METHOD

Participants were 73 female patients aged 11-18 presenting for mental health treatment at an outpatient psychiatry clinic in a large metropolitan hospital. Measures used in this study include the Diagnostic Interview for Borderline Personality Disorder-Revised, Borderline Personality Questionnaire and The Short Screen for Eating Disorders.

RESULTS

Youth with BPD had significantly more disordered eating behaviour compared to controls. Of the nine facets of BPD, eight were highly correlated with disordered eating, suggesting important shared variance between the constructs of BPD and disordered eating. This study also demonstrated that rejection sensitivity significantly mediated the relationship between BPD symptoms and disordered eating.

CONCLUSIONS

This paper provides a novel association between a diagnosis of BPD in adolescents and disordered eating and the mediation effect of rejection sensitivity. These findings suggest that disordered eating should be screened in BPD samples and interventions targeting rejection sensitivity may be of clinical use.