Abstract

Background and Objectives: This study aimed to investigate the psychometric properties of the Iranian-Islamic spiritual well-being questionnaire (SWBQ), which involves 22 items adapted to the Iranian cultural context. Methods: The current study was descriptive-analytical. After designing the questions according to the Iranian-Islamic culture based on the literature review, the content validity was examined by experts (five people with a PhD in psychology), and the content validity index (CVI) and content validity ratio (CVR) indices were used to check the quantitative content validity. To check the face validity, ten people aged 18 to 60 were used as a sample. Also, exploratory and confirmatory factor analysis was used to check construct validity, and Cronbach’s α, test re-test, and Spearman-Brown and Guttman split-half coefficients were used to check reliability. In examining the construct validity and reliability of the questionnaire, 400 adults aged 18 to 60 years were selected and assessed as a sample from Mashhad City in 2021 by available sampling. Results: The CVR for five experts was obtained to be >0.99, and the CVI for 22 terms of the questionnaire was obtained ≥0.79, which is in the desired range. The exploratory factor analysis identified six factors, which together explained 77.25% of the total variance. The results obtained from the confirmatory factor analysis supported the proposed model. The Cronbach’s α coefficient of the Iranian-Islamic SWBQ and its factors was obtained from 0.77 to 0.91. In the split-half method, Spearman-Brown and Guttman correlation coefficients were 0.88 and 0.87, respectively. The test re-test reliability coefficients of the total score of the questionnaire and subscales were between 0.78 and 0.83. Conclusion: It can be concluded that the Iranian-Islamic SWBQ has favorable psychometric properties.