en روانسنجي Psychometric پژوهشي Original Research Article <strong>Objective</strong>: Measuring, diagnosing, and determining the severity of the symptoms of Obsessive-Compulsive Disorder (OCD) is essential for studying mental health issues. This study aimed to determine the psychometric properties of the Persian version of the Dimensional Obsessive-Compulsive Scale (DOCS) in a non-clinical population.&nbsp;<br> <strong>Methods</strong>: 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, Yale-Brown Obsessive-Compulsive Scale (Y-BOCS), and Obsessive-Compulsive Inventory-Revised (OCI-R). 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.<br> <strong>Results</strong>: The Internal consistency of DOCS was 0.916 based on the Cronbach &alpha; value. The correlations of DOCS with Y-BOCS &nbsp;and OCI-R were 0.57 and 0.55, respectively. Exploratory factor analysis showed four factors. Confirmatory factor analysis also showed that this four-factor and higher-order factor models had a good fit for the data.<br> <strong>Conclusion</strong>: The present study indicated acceptable validity and reliability of DOCS in non-clinical populations in Iran. Therefore, this scale be used to screen people with OCD symptoms in non-clinical centers of mental health assessment. Dimensional Obsessive-Compulsive Scale (DOCS), Obsessive-Compulsive Dsorder (OCD), Psychometric, Validity 165 178 http://jpcp.uswr.ac.ir/browse.php?a_code=A-10-690-2&slc_lang=en&sid=1 Mohammad Mohammadi mohammadmohammadi059@gmail.com 0000-0001-9999-8912 No Department of Clinical Psychology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Seyed Mojtaba Ahmadi mojtabakmahmadi@yahoo.com 0000-0002-5925-6727 No Department of Clinical Psychology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran. Fatemeh Naji Mydani 72fatimanajim@gmail.com 0000-0001-7806-9102 No Department of Clinical Psychology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Mahdi Jafari drmjafari@sbmu.ac.ir 0000-0002-3210-5013 Yes Department of Clinical Psychology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Sajjad Reisi sajjadreisi1373@gmail.com 0000-0002-2385-8283 No Department of Clinical Psychology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran.