en روان شناسی تکاملی Evolutionary Psychology پژوهشي Original <div style="text-align: justify;"><span style="color:#3366ff;"><span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="line-height:2;"><b>Objective</b>: This study aimed to examine the relationship between psychological satisfaction and couples&rsquo; conflicts, with a specific focus on the mediating roles of perceived competence and couples&rsquo; self-determination.<br> <b>Methods</b>: The research employed a descriptive‑correlational design using structural equation modeling. The statistical population consisted of couples who visited counseling centers in Arsanjan city during the spring of 1404. Based on the Morgan table, 120 participants were selected through available sampling. Data were collected using four standardized instruments: the Couple Conflict Questionnaire (Torabi & Sanaei, 1375), the Perceived Competence Scale (Harter, 1985), the Couple Self‑Determination Questionnaire (LaGuardia et al., 2000), and the Successful Cognitive Acceptance Questionnaire (Dan Gardavarie & Anderval, 2010). Data analysis was performed using SmartPLS software, applying multiple structural equation modeling and testing various role models.<br> <b>Results</b>: Findings indicated that psychological acceptability was positively and significantly associated with both perceived competence and self‑determination. Additionally, these two variables demonstrated a negative relationship with couple conflicts. Further analysis confirmed that perceived competence and self‑determination served as significant mediators in the relationship between psychological acceptability and couple conflict.<br> <b>Conclusions</b>: Psychological acceptability contributes to reduced couple conflicts both directly and indirectly by enhancing partners&rsquo; sense of competence and autonomy within the relationship. These results highlight the importance of fostering psychological satisfaction to improve relational functioning and reduce conflict among couples.</span></span></span></span></div> Psychological flexibility, Couple conflicts, Perceived competence, Couple self-determination 0 0 http://ieepj.hormozgan.ac.ir/browse.php?a_code=A-10-1146-1&slc_lang=en&sid=1 Zahra Imanfar imanfar.psy@gmail.com 100319475328460012485 100319475328460012485 No M.A Student, Department of Psychology, Ars.C.., Islamic Azad University, Arsanjan, Iran Reza Mirzaei Mirzaei.psy@gmail.com 100319475328460012486 100319475328460012486 Yes Assistant Professor, Department of Psychology, Ars.C.., Islamic Azad University, Arsanjan, Iran