Mahnaz Joukar

Aim and Background: Cognitive biases are systematic distortions in thinking that result in judgment and decision-making errors. They are known to contribute to maladaptive behaviors and play a role in the onset and maintenance of psychological disorders. This study aimed at evaluating the effectiveness of cognitive bias modification (CBM) in reducing perfectionism and enhancing cognitive flexibility among individuals with Obsessive-Compulsive Personality Disorder (OCPD). Methods and Materials: The study population comprised individuals diagnosed with OCPD who attended the Hamraz Counseling and Psychological Services Center affiliated with the Gonbad-e Kavus Department of Education in 2024. Diagnoses were established using the Obsessive-Compulsive Personality Disorder Questionnaire (Martukovich, 2010) and the Structured Clinical Interview for DSM Axis II Disorders. A total of 40 individuals were selected through convenience sampling and randomly assigned to experimental and control groups (20 participants each) with a pre-test–post-test. The experimental group participated in eight sessions of CBM intervention delivered via specialized software over a two-month period. All participants completed the Frost Multidimensional Perfectionism Scale (1990) and the Cognitive Flexibility Inventory by Dennis et al. (2010) at both pre-test and post-test. Findings: The findings indicated that CBM intervention significantly reduced levels of perfectionism and its components while improving cognitive flexibility and its associated components. Conclusions: Cognitive Bias Modification may serve as an effective and cost-efficient adjunctive treatment, particularly for individuals with OCPD who often show limited responsiveness to conventional therapeutic approaches