Religious Perfectionism Scale: Assessment of Validity and Reliability Among Undergraduate Students in Iran.

Religious perfectionism is a construct that may help to either improve mental health or cause mental health difficulties. The Religious Perfectionism Scale (RPS; Wang in J Relig Health 59: 318-333, 2020) is a useful tool for assessing religious perfectionism around the world, but its psychometric properties have yet to be tested in Iran. The sample in the present study consisted of 300 Iranian undergraduate students (180 females) from Azad University who completed the RPS, the Depression Anxiety Stress Scale-2, and the Moral Perfectionism Scale. The impact score was used to determine face validity, and the values of the impact score for all translated items were greater than 1.5, meaning that the items had satisfactory face validity. The Content Validity Index (CVI) values were above the acceptable cutoff score of 0.7, indicating the acceptable content validity of items. The Content Validity Ratio (CVR) scores were greater than the cutoff score of the Lawshe table (.78), indicating the satisfactory essentiality of the items. To measure construct validity, the results of a confirmatory factor analysis (CFA) using AMOS software confirmed the scale with two subscales (zealous religious dedication and religious self-criticism). No item was removed from the scale as all factor loading values were greater than 0.49. The findings support the psychometric properties of the scale for measuring religious perfectionism among undergraduate students in Iran.