Tehran University of Medical Sciences Iranian Journal of Psychiatry 1735-4587 5 4 2010 12 15 154 158 Ali Reza Azizi The Student of Master degree Programme in clinical psychology, Allame Tabatabaei university, Tehran, Iran 2015 10 14 Objectives: This study aims to assess the validity and reliability of the Persian version of Simons and Gaher `s Distress Tolerance scale(DTS) by administering it to nicotine dependent students of Tehran University. Method: In a descriptive cross-sectional study, 317 nicotine dependent students of Tehran University who were selected ,using available sampling method, completed DTS, Coping with Stress- Revised(CS-R), Positive and Negative Affect Scales(PANAS) and Fagerstrom Test for Nicotine Dependence(FTND). Data were analyzed using descriptive statistic methods and correlation coefficient. Results: The alpha coefficients for Tolerance, Absorption, Appraisal and Regulation subscales were 0.75, 0.77, 0.70 and 0.75, respectively. The test-retest correlation coefficients with two months interval for Tolerance, Absorption, Appraisal and Regulation subscales and the total scale were 0.71, 0.69, 0.77, 0,73 and 0.79, respectively; all of which were statistically significant (p<0.001). The correlation coefficient of DTS with problemfocused, emotional-focused, less useful and insufficient coping with stress were found to be: 0.213, -0.278, -0.337 and -0.196. In addition, the correlation coefficient of DTS with positive emotion, negative emotion and smoking-dependency were 0.543, -0.224 and -0.653 which were also significant(p<0.05). Conclusion: the DTS is valid and reliable and suitable to use for assessing distress tolerance. https://ijps.tums.ac.ir/index.php/ijps/article/view/348 https://ijps.tums.ac.ir/index.php/ijps/article/download/348/344