Maher Institute Inc Iranian Journal of Neurodevelopmental Disorders 3115-848X 4 2025 12 01 Investigating the Effectiveness of Schema Therapy on Negative Perfectionism and Obsessive Thoughts in a Group of Patients with Obsessive-Compulsive Disorder Investigating the Effectiveness of Schema Therapy on Negative Perfectionism and Obsessive Thoughts in a Group of Patients with Obsessive-Compulsive Disorder 1 14 EN Journal Article 2025 07 01 <p><strong>Purpose: </strong>This study aimed to examine how schema therapy can help reduce negative perfectionism and obsessive thoughts in a group of individuals diagnosed with OCD.<strong> </strong></p> <p><strong>Methods and Materials: </strong>The current study was a quasi-experimental research project that involved a pre-test, post-test, and a follow-up phase lasting three months, with both control and experimental groups. The study focused on clients with a history of obsessive-compulsive disorder who sought treatment at psychology clinics in Tehran during the summer and fall of 2023. The sample size consisted of 32 individuals selected through purposive sampling methods. The educational program consisted of seven sessions lasting 90 minutes each, held twice a week at the research location. The research utilized the Positive and Negative Perfectionism Scale (PANPS) and the Maudsley Obsessive-Compulsive Inventory (MOCI) to measure outcomes. Data analysis was performed using SPSS version 27 software, employing descriptive statistics (mean and standard deviation), repeated measures ANCOVA, and Bonferroni and Kruskal-Wallis H post hoc tests at a P-value of 0.05.</p> <p><strong>Findings: </strong>Based on the research results, the P-value for Between-Subjects Effects showed significance between the experimental and control groups when analyzing negative perfectionism and checking variables (p&lt;0.001). Additionally, the P-value for Between-Subjects Effects was significant between the experimental and control groups for the slowness variable (p=0.024). Similarly, the P-value for Between-Subjects Effects indicated significance between the experimental and control groups for the doubting variable (p=0.032). However, the P-value for Between-Subjects Effects did not show significance between the experimental and control groups for the cleaning variable (p=0.135).</p> <p><strong>Conclusion:</strong> The results of this study suggest that schema therapy is a beneficial method for decreasing negative perfectionism and assisting individuals with obsessive-compulsive disorder. This research can aid therapists and psychologists in enhancing treatment strategies for those with the disorder.</p> https://www.maherpub.com/index.php/jndd/article/download/634/498