Psychometric Properties of the Persian Version of the Dimensional Obsessive-Compulsive Scale in A Non-clinical Population

Objective: Measuring, diagnosing, and determining the severity of the symptoms of ObsessiveCompulsive Disorder (OCD) is essential for studying mental health issues. This study aimed to determine the psychometric properties of the Persian version of the Dimensional ObsessiveCompulsive Scale (DOCS) in a nonclinical population. Methods: In this cross sectional study, 252 residents of Tehran (Iran) were selected by cluster sampling method from different districts. They were asked to complete DOCS, YaleBrown ObsessiveCompulsive Scale (YBOCS), and Obsessive Compulsive Inventory Revised (OCIR). SPSS v. 21 and LISREL statistical software were used for data analysis. Cronbach #39;s alpha, exploratory and confirmatory factor analysis, Spearman correlation were also used. Results: The Internal consistency of DOCS was 0.916 based on the Cronbach alpha value. The correlations of DOCS with YBOCS and OCIR were 0.57 and 0.55, respectively. Exploratory factor analysis showed four factors. Confirmatory factor analysis also showed that this fourfactor and higherorder factor models had a good fit for the data. Conclusion: The present study indicated acceptable validity and reliability of DOCS in nonclinical populations in Iran. Therefore, this scale be used to screen people with OCD symptoms in nonclinical centers of mental health assessment.