Severity Indices of Personality Problems (SIPP–118) in Adolescents: Reliability and Validity

The Severity Indices of Personality Problems (SIPP–118; Verheul et al., 2008) is a self-report question-naire focusing on core components of (mal)adaptive personality functioning. The SIPP–118 was developed and validated in an adult population. In adult populations, the 16 facets of the SIPP–118 fit into 5 higher order domains: self-control, identity integration, relational capacities, social concordance, and responsibility. In this study we present the 1st psychometric properties of the SIPP–118 in adolescents. We compared the SIPP–118 scores of a patient and a nonpatient sample of adolescents, and compared personality disordered and non-personality disordered adolescents. In addition, the relationship between scores on the SIPP–118 and other clinical instruments (Symptom Checklist—90–Revised