Effectiveness of group intervention of forgiveness on mental health and anger control Prisoners with a crime of mass fight

Positive psychology (forgiveness training), can cause an increase in mental health and anger control. The purpose of this study was to teach forgiveness on mental health and anger control of inmates with mass fight crime in central prison of Yasooje. Therefore, 90 patients were randomly assigned to experiment and control groups (60 patients with pretest and post-test and 30 control). The Experiment group was taught forgiveness in 7weekly sessions, each session lasting 90 minutes, but the control group underwent no training. People were evaluated in both pre and post-tests in terms of aggression and mental health. The data variance analysis indicated that the means cores of mental health in experimental group compared to the control group has increased at post-test stage. The mean scores for anger control as compared to the control group at post-test, was found to have a significant reduction. It seems that teaching forgiveness and its components, on one hand can reduce large part of people going to prison and on the other hand it helps to improve the mental health and anger control, especially while they are in prison; what seems to be necessary for the prison guards, staff and managers.