The aim of this study was the effectiveness of positive psychology skills training on increasing the life expectancy of addicts referred to addiction treatment centers in Tehran.

The research method was quasiexperimental with pretest, post-test, and follow-up design with a control group. In this study, 60 addicts were selected who were randomly assigned to experimental (n=30) and control (n=30) groups. Group therapy sessions consisted of 10 sessions, twice a week for 90 minutes each time. The research tool was Snyder Hope Questionnaire. Analysis of variance with repeated measures was used to analyze the data.

The results showed that there was a statistically significant difference in the mean score of hope in the experimental and control groups (P<0.001). The results showed that teaching positive psychology skills as a group can significantly increase hope in addicts.

Therefore, positive psychology with a strong theoretical and research background is an appropriate strategy to increase life expectancy and can be used as an effective intervention method to increase life expectancy in addicts.