Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 52 1 2014 01 15 66 75 EN Giti Shams Department of Psychiatry, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran. Yaghoob Esmaili Department of Psychology, Islamic Azad University Rodhen Branch, Rodhen, Iran. Narges Karamghadiri Department of Psychiatry, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran. Narges Ebrahimhkani Department of Psychiatry, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran. Youness Yousefi Department of Psychiatry, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran.. Dean McKay Department of Psychology, Fordham University, USA. 2015 10 11 The Obsessive Beliefs Questionnaire-44 (OBQ-44), a self-report measure, was developed by the Obsessive Compulsive Cognitions Working Group (OCCWG) to assess beliefs considered relevant in the etiology and maintenance of obsessions and compulsions. The purpose of this study was to evaluate the psychometric properties of the Persian language version of the Obsessive Beliefs Questionnaire (POBQ-44). A sample of 222 medical students from an Iranian university was used to assess the reliability and validity of the POBQ-44. The results indicated five factors: 1) general, 2) perfectionism, certainty, 3) responsibility and threat estimation, 4) importance and control of thoughts, 5) complete performance. Each of these factors was found to have adequate test-retest and internal consistency reliability. Each of the factors was associated with O-C symptoms. In addition, adequate convergent validity was found with a measure of obsessive compulsive symptoms, and discriminate validity was found with measures of depression and anxiety. https://acta.tums.ac.ir/index.php/acta/article/view/4729 https://acta.tums.ac.ir/index.php/acta/article/download/4729/4577