University of Mohaghegh Ardabili Journal of Family Relations Studies 2980-938X 5 3 2025 08 01 Developing a causal model of Family function based on psychological Hardiness through Persistent psychological symptoms post-COVID-19 Syndrome 12 22 3239 10.22098/jfrs.2024.14351.1168 EN Mahnoosh Mohrehkesh Ph.D. Candidate of psychology, Allameh Tabataba'i University, Tehran, Iran. Faramarz Sohrabi Professor of Clinical Psychology Department, Allameh Tabataba'i University, Tehran, Iran Ahmad Borjali Professor of Clinical Psychology Department, Allameh Tabataba&#039;i University, Tehran, Iran Noor Ali Farrokhi Professor of Evaluating and Measuring Department, Allameh Tabataba&#039;i University, Tehran, Iran Journal Article 2024 01 01 <strong>Objective:</strong> Family functioning is one of the structures that can have a significant impact on the psycho-social functioning of its members. For this reason, identifying the factors affecting it will greatly help to improve the family's performance. The purpose of the current research was to develop a causal model of Family function based on psychological Hardiness and Psychological capital through Persistent psychological symptoms post-COVID-19 Syndrome.<br /><strong>Methods:</strong><strong> </strong> The statistical population of the present study was men and women of Karaj and Tehran provinces in 2023 who had at least one history of contracting COVID-19. From the statistical population, using an available sampling method, 395 eligible individuals were selected to participate in the research and complete the research questionnaires. In this research,  Kobasa's Psychological Hardiness questionnaires, Depression, Anxiety, and Stress Scale (DASS-21), Corona Disease Anxiety Scale (CDAS), Corona Stress Scale (CSS-18), suitable for the Iranian lifestyle, and the Questionnaire of Family Functioning were used. The collected data were analyzed using the structural equation analysis method in Amos software (0.084).<br /><strong>Results:</strong> The findings of this research indicated that Psychological Hardiness directly (0.085) and indirectly through psychological symptoms after COVID-19 (p<0.05) was able to significantly predict family functioning.<br /><strong>Conclusion:</strong> According to the findings of this research, it seems that strengthening personal psychological structures in the face of environmental stressors can improve people's performance in dealing with these conditions. https://jhrs.uma.ac.ir/article_3239_b308fe63e09909acab53050bad7ea928.pdf