Volume 20, Issue 80 (9-2026)
Research on Addiction 2026, 20(80): 33-74 |
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Bagian Koulemarzi M J. Psychometric Properties of the Persian Version of the Tolerance for Mental Pain Scale in Substance-Using and Recovered Individuals. Research on Addiction 2026; 20 (80) :33-74
URL: http://etiadpajohi.ir/article-1-3406-en.html
URL: http://etiadpajohi.ir/article-1-3406-en.html
Assistant Professor of Psychology, Faculty of Humanities, Sayyed Jamaleddin Asadabadi University, Asadabad, Hamedan, Iran
Abstract: (290 Views)
Objective: Objective: This study aimed to investigate the psychometric properties and cultural adaptation of the Persian version of the tolerance for mental pain scale (TMPS) among individuals with opioid use disorder and those in sustained recovery. Method: The present study was a psychometric investigation. The statistical population comprised all opioid-using individuals and those in sustained recovery from opioids in Lorestan Province in 2025. In the first study, exploratory factor analysis (EFA) was performed on 400 individuals (200 current users and 200 in sustained recovery) selected via purposive sampling. Additionally, in the second study, confirmatory factor analysis (CFA) was conducted on 600 individuals (300 opioid users and 300 in sustained recovery) recruited using purposive sampling. Participants completed the TMPS, the hopelessness scale, the hospital anxiety and apression scale, the stages of change readiness and treatment eagerness scale, and the mental pain scale. Data were analyzed using EFA and CFA. Results: The results of the EFA confirmed a two-factor structure, consisting of pain management and pain tolerance, for the TMPS in both groups. Good internal consistency was obtained for the total scale in both the recovered group (α = 0.92, 𝜔 = 0.91) and the substance-using group (α = 0.87, 𝜔 = 0.85). CFA demonstrated an adequate fit for a second-order two-factor model. Concurrent validity was established through significant negative correlations between the TMPS and depression, anxiety, hopelessness, and subjective pain. Furthermore, discriminant validity indicated that the scale was capable of explaining 94% of the variance in the difference between the two groups. Conclusion: The findings support the use of the TMPS for research and clinical purposes within the Iranian population.
Type of Study: Research |
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Received: 2026/01/23 | Accepted: 2026/08/27 | Published: 2026/09/10
Received: 2026/01/23 | Accepted: 2026/08/27 | Published: 2026/09/10
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