Objective: Dysfunctional attitudes are factors leading to many of psychiatric diseases such as obsession. In this regard, this
study was conducted to examine the efficacy of Cognitive Therapy (CT) on beliefs in Obsessive Compulsive Disorder (OCD).
Method: Experimental method with two control and experimental groups applied in this study. Statistical population of this
study consisted of 120 patients with OCD referring to a specialized clinic for OCD treatment in Tehran; of that, 40 patients who
had required criteria were selected through random method and assigned to two 20-member groups including experimental
group (cognitive restructuring) and control group. Pretesting two groups, first group participated in 10 sessions for cognitive
restructuring while control group were in waiting list. Weissman and Beck’s Dysfunctional Attitude Scale was used as tool in this
research and obtained findings were analyzed using descriptive statistics and ANCOVA through SPSS-18 Software.
Results: The results showed that there is a significant difference between two groups in negative beliefs in post intervention
Discussion and Conclusion: Cognitive therapy could significantly effect on negative beliefs and attitude in patients with