Tehran University of Medical Sciences Iranian Journal of Psychiatry 1735-4587 11 2 2016 06 01 75 81 EN Zahra Ramezani Department of Clinical Psychology, Shiraz University, Shiraz, Iran Changiz Rahimi Department of Clinical Psychology, Shiraz University, Shiraz, Iran Nourollah Mohammadi Department of Clinical Psychology, Shiraz University, Shiraz, Iran 2016 05 30 Objective: Recent studies have emphasized the important role of cognitive beliefs in etiology and ‎maintenance of obsessive-compulsive disorder (OCD). OCD has different subtypes, but the ‎specific role of cognitive beliefs in OCD symptomatology is not clear. The aim of the current ‎study was to determine whether the cognitive factors proposed by Obsessive Compulsive ‎Cognitions Working Group (OCCWG) could specifically predict subtypes of OCD.‎ Method: The question was investigated in a sample of 208 university students (mean age = 21, SD = 1.6). ‎The target population was selected by cluster sampling. All participants completed two ‎questionnaires including Obsessive Beliefs Questionnaire (OBQ-44) and Obsessive Compulsive ‎Inventory-Revised (OCI-R). Data were analyzed using descriptive statistics and regression ‎analysis.‎ Results: Regression analysis demonstrated that “responsibility/ threat over estimation” was a significant ‎predictor of obsessive and compulsive behaviors and predicted washing, checking, obsessing, ‎hoarding, and neutralizing subtypes of OCD. Furthermore, “perfectionism and intolerance of ‎uncertainty” was the most significant predictor of ordering and hoarding while ‎‎“importance/ control of thought” predicted ordering only.‎ Conclusion: This study found evidence in support of Salkovskis’ cognitive theory about the central role of ‎inflated responsibility beliefs in developing different subtypes of OCD. Besides, the results ‎revealed those other cognitive beliefs had less important role in the development of OCD ‎symptoms. ‎ https://ijps.tums.ac.ir/index.php/ijps/article/view/701 https://ijps.tums.ac.ir/index.php/ijps/article/download/701/553