Latent Structure and Incremental Validity of the Semi‐Structured Interview for Personality Functioning DSM‐5 (STiP‐5.1) in a Lithuanian Adolescent Sample
Cross-sectional study reveals the latent structure and validity of clinician-rated personality functioning in adolescents, highlighting the value of multimethod assessment.
Key Points
To evaluate the latent structure of the Semi-Structured Interview for Personality Functioning DSM-5 (STiP-5.1) and determine its incremental validity in predicting functional impairment beyond self-report measures.
Assessed 178 adolescents aged 11–18 years from Lithuania, including a clinical sample (n = 104) and a community sample (n = 74).
Evaluated latent structure using confirmatory factor analysis (CFA) and bifactor modeling.
A bifactor model demonstrated the best fit and revealed a predominant general factor accounting for most reliable variance, while a four-factor CFA model also showed excellent fit across identity, self-direction, empathy, and intimacy.
Clinician-rated personality functioning explained additional variance in functional impairment beyond self-reports, with self-direction acting as a unique predictor.