The Effectiveness of Metallization-Based Therapy on Splitting and Paranoid Ideation in Borderline Personality Disorder

Objective: This study aimed to investigate the effectiveness of Mentalization Based Therapy on Splitting and Paranoid Ideation of Borderline Personality Disorder patients. Methods and Materials: The present study was a quasi-experimental one, which included pretest-posttest design with a control group. The population of this study consisted of all people with borderline personality disorder referring to Tehran’s psychotherapy clinics in 2023. The sample included 30 people with BPD who were selected through availability sampling and randomly assigned into intervention and control group. After being examined by pretests of splitting and paranoid ideation, the examinees of intervention group received 12 MBT group sessions. Then a posttest was conducted using Splitting Index and Paranoia Scale. The data were analyzed via SPSS-26 through Analysis of Covariance. Findings: Intervention group’s means were reduced and the difference between groups in splitting (F=86.33, p<0.05) and paranoid ideation (F=65.47, p<0.05) were significant. Conclusion: The findings from this study underline the benefits of Mentalization based therapy in addressing splitting and paranoid ideation among borderline personality disorder patients and study highlights the importance of addressing splitting and paranoid ideation as a means to improve BPD patients’ communicational problems.