Zahra Shadara - Department of Clinical Psychology, Faculty of Educational Science and Psychology, Shahid Beheshti University, Tehran, Iran.
Mohsen Dehghani - Department of Clinical Psychology, Faculty of Educational Science and Psychology, Shahid Beheshti University, Tehran, Iran.
Mahmoud Heidari - Department of Clinical Psychology, Faculty of Educational Science and Psychology, Shahid Beheshti University, Tehran, Iran.
Majid Mahmoud Aliloo - Department of Clinical Psychology, Faculty of Educational Science and Psychology, Tabriz University, Tabriz, Iran.

Objective: Borderline Personality Disorder (BPD) is one of the most severe psychiatric disorders. This study aimed to predict distress tolerance, impulsivity, and aggression based on emotional dysregulation and reward sensitivity among individuals with BPD features. Methods: The study population was undergraduate students of Shahid Beheshti University, Tehran City, Iran, in the academic year ۲۰۱۷-۱۸. A total of ۱۰۰۵ male and female students were chosen based on the available sampling method and were screened according to the personality assessment inventory-borderline scale. Finally, ۱۴۶ subjects (۵۰ males and ۹۶ females) could reach the second phase of the research, and all of them completed the difficulties in emotion regulation scale, distress tolerance scale, Balloon analog risk task as well as aggression questionnaire. To analyze the data, we used multivariate regression analysis. Results: Results of the current research showed that emotional dysregulation and its components had a predictive role in distress tolerance and aggression. On the other hand, only reward sensitivity could have an essential role in predicting impulsivity in individuals with BPD features. Conclusion: This study reflects the remarkable role of emotional regulation mechanisms in distress tolerance and aggression, and in contrast, the role of biological mechanisms such as sensitivity to reward in impulsivity among individuals with BPD features. Furthermore, the present research results can have clinical implications considering both etiology and treatment of BPD patients.

Borderline personality disorders, Emotional regulations, Delayed gratification, Emotional distress, Impulsivity, Aggression