en روانشناسی Psychology پژوهشي Original Research Articles <div style="text-align: justify;"><span style="font-size:14px;"><span style="font-family:Tahoma;"><span style="line-height:2;"><strong>Objectives</strong>: Patients with borderline personality disorder (BPD) often develop a certain depression that may be accompanied by &ldquo;mental pain.&rdquo; A negative self-concept, aversive chronic emotions, and pervasive helplessness characterize mental pain. This research aims to explore the pathology of BPD symptomatology in a nonclinical sample. Also, the role of mental pain, cognitive emotion regulation, self-compassion, and depression are assessed.<br> <strong>Methods</strong>: Following a correlational study, 300 university students were selected via the multi-stage random cluster sampling method. The study data were collected by the personality assessment inventory-borderline features scale, Orbach and Mikulincer mental pain questionnaire, cognitive emotion regulation questionnaire, self-compassion scale (SCS-SF), and Beck depression inventory version 2.<br> <strong>Results</strong>: Multiple regression analyses indicated that components of putting into perspective, rumination, loss of control, refocus on planning, catastrophizing, irreversibility, somatic, and isolation (&Delta;R2=0.507, P<0.001) significantly predicted BPD symptomatology.<br> <strong>Discussion</strong>: The results support the biosocial model dimensions in an Iranian context. In addition, it shows a strong association between mental pain, cognitive emotion regulation, self-compassion, depression, and BPD symptoms.<br> <br> <strong>Coresponding author:</strong>&nbsp;Mohammad Javad Bagian Kulehmarzi,&nbsp;E-mail:&nbsp;javadbagiyan@yahoo.com</span></span></span></div> Borderline personality disorder, Self-compassion, Mental pain, Depression, Cognitive emotion regulation strategies 337 346 http://irj.uswr.ac.ir/browse.php?a_code=A-10-1579-1&slc_lang=en&sid=1 Moslem Rajabi rajabim_22@yahoo.com 0000-0002-9694-975X No Department of Clinical Psychology, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Jafar Sarani Yaztappeh sarani.jafar@yahoo.com 0000-0002-6430-202X No Department of Clinical Psychology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Sajad Khanjani khanjanis23@yahoo.co 0000-0001-5697-083X No Department of linical Psychology, School of Behavioral Sciences and Mental Health, Iran University of Medical Sciences, Tehran, Iran. Mohamad Davood Mohebi mdmohebi@gmail.com 0000-0002-6984-8961 No Department of Psychiatry, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran. Mohammad Javad Bagian Kulehmarzi javadbagiyan@yahoo.com 0000-0002-0487-3461 Yes Department of Psychology, Faculty of Social Sciences, Razi University, Kermanshah, Iran.