This research was conducted to determine the mediating role of self-regulation strategies (self-restraint and coherent self-knowledge) in the relationship between attachment styles and the quality of interpersonal relationships. The method of the current research was correlation of the structural equation modeling type. The statistical population of this research included all students of Azad universities who were referred to the counseling centers of Azad colleges in Tehran with a major complaint in the field of interpersonal relations in 1402. According to Klein's formula, 400 people were selected through convenience sampling and were asked to complete questionnaires about Ghorbani's Cohesive Self-knowledge (2008), Tanjani's short form of self-regulation (2004), Hazen and Shaver's attachment (1987), and the quality of interpersonal relationships by Pierce (1991). The obtained data were analyzed using SPSS and AMOS software. The results of Pearson correlation and path analysis showed that self-regulation can mediate the relationship between attachment styles and the quality of interpersonal relationships. According to the research results, insecure attachment is associated with a decrease in the quality of interpersonal relationships. Therefore, what helps a person improve the quality of interpersonal relationships is having a suitable intrapsychic capacity, enabling them to return to balance faster and with fewer complications while maintaining the order of their intrapsychic organization. Implicitly, it can be suggested that based on the model of self-regulation, having coherent management of one's inner psychological organization, in cognition, emotion, and behavior, can help a person have optimal tolerance capacity in interpersonal problems.
