Background
The Personality Inventory for DSM–5, Brief Form (PID-5-BF) was developed to assess the DSM-5's alternative trait model for diagnosing personality disorders. Psychometric properties of PID-5-BF have been verified in some Western countries, but to our knowledge, no study has examined the psychometrics of PID-5-BF in Iranian settings. This is the first study designed to examine the factor structure, internal consistency, and convergent/discriminate validity of the Persian PID-5-BF with student and clinical samples in Iran.
Methods
378 university students (n = 378; M-age = 16.35; 55.6 % females) and 150 clinical patients (n = 150; M-age = 43.81; 58.7 % men) completed the Persian version of the PID-5-BF and NEO-FFI. Confirmatory factor analyses (CFAs) were performed to examine the five-factor model of PID-5-BF. Also, internal consistency and external validity of PID-5-BF were calculated.
Results
Confirmatory factor analysis supported the proposed five-factor model of PID-5-BF in both groups. The Chronbach's alpha coefficient ranged from .57 (Disinhibition) to .65 (Psychoticism) for the student sample and from .48 (Antagonism) to .67 (Detachment) for the clinical sample, while when relying on the MIC values, the PID-5-BF subscales indicated acceptable internal consistency in both groups. PID-BF-5 significantly differentiated the clinical sample from the student sample (p < .001), indicating the measure's adequate discriminate validity. Additionally, PID-5-BF subscales yielded hypothesized association with the external criterion variable in only the student sample.
Conclusion
Our results support the use of the PID-5-BF as a screening measure of dimensional maladaptive personality traits in Iranian samples. However, future studies are needed to examine the convergent validity of PID-5-BF in Iranian clinical samples with suitable external criterion measures.