Mohammad Mohammadipour, Reyhaneh Hashempour Mofasali
This research is a semi-experimental study (pretest-posttest design with a nonequivalent control group) which has been conducted with the aim of investigating the effectiveness of family system therapy in forgiveness and family function among the couples affected by extramarital relationships of the spouse. The research statistical population consisted of all the couples affected by extramarital relationships of the spouse who referred (during March 2015 to March 2016) to psychological services clinics in Mashhad. The research sample comprised 30 people from these women who were selected voluntarily and through available sampling method. The research tools included Forgiveness Scale (Pollard, Anderson, Anderson & Jennings, 1998) and Family Assessment Device [3]. To analyze the data, analysis of covariance (MANCOVA) was applied. The results obtained from data analysis demonstrated that family system therapy has been effective in forgiveness and family function among the couples affected by extramarital relationships of the spouse in the experimental group compared to the control group (P<0.05).