Self-report versus clinical ratings using the SWAP-200 in the assessment of personality disorders

Abstract

The relationship between self- and informant reports of personality using psychometric instruments is constantly the focus of attention for researchers in the field of clinical assessment in psychology. The research shows weak agreement between clinicians and patients’ assessments of personality disorders (PDs). The current study aimed at the convergence of measurement of PDs using the Shedler-Westen Assessment Procedure (SWAP-200), the self-report Character Styles Questionnaire-R (CSQ-R) and Borderline Personality Inventory (BPI). Paper-pencil questionnaires were administered to 102 inpatients (88.2% female, aged 18-64, M = 38.4) in a voivodeship hospital and outpatient health care centre. The SWAP-200 allowed us to gather expert (clinician) personality ratings basing on the intensive contact with patients. Results show that only a few SWAP-200 PD scales showed low positive correlations with corresponding self-reported PD scales from the CSQ-R. With the canonical correlation analysis, we identified two functions (borderline and internalising) that described similarities between the SWAP-200 and CSQ-R. SWAP-200 Obsessive-Compulsive PD correlated negatively with BPI scales. Consistent with previous studies, the self-report and the clinical assessment were only marginally convergent. Furthermore, OCPD stands out from other disorders in that it correlates positively with health indicators and negatively with some of the other personality disorders. The highest agreement was observed in the description of Borderline PD.