Shenakht Journal of Psychology & Psychiatry

Introduction: In recent years, a notable paradigm shift has occurred in the diagnosis of personality disorders, moving from categorical approaches toward dimensional models. These new models conceptualize personality disorders along continuous dimensions rather than fixed types.
Aim: The present study was conducted to examine the psychometric properties and factor structure of the Iranian version of the “Operationalized Psychodynamic Diagnostics–Structure Questionnaire (OPD-SQ) ".
Method: This research employed a descriptive psychometric design. The statistical population consisted of all adult residents of Sanandaj in 2024. A total of 475 participants were selected through convenience sampling. Data were collected using the OPD-SQ (2008). Construct validity was assessed using exploratory and confirmatory factor analyses, and reliability was examined using Cronbach's alpha and McDonald's omega coefficients. Data analysis was conducted using SPSS version 24 and JASP.
Results: Exploratory factor analysis extracted 22 factors explaining 77% of the variance across 95 items. Confirmatory factor analysis supported the model’s fit with the following indices: CFI = 0.96, GFI = 0.97, and RMSEA = 0.096. Internal consistency was high, with a Cronbach's alpha of 0.973 and McDonald’s omega of 0.971 for the entire scale. Subscale reliability based on alpha and omega ranged from 0.850 to 0.913 and 0.858 to 0.917, respecrively.
Conclusion: The Iranian version of the OPD-SQ demonstrated strong psychometric properties with suitable reliability and construct validity. This tool can be effectively used in clinical and research settings, particularly for diagnosis, treatment planning, and evaluating psychotherapy outcomes.