In China, many people are converting to various world religions. Nonetheless, religious adherence for them, as with many people, can still function as a double-edged sword with regards to mental health. In particular, religious perfection can become either a healthy commitment or a rigid outlook that leads to distress. Thus, we developed the Religious Perfectionism Scale (RPS) from Chinese religious believers. In the first phase (N = 171), we collected qualitative data through an open-question survey from different religious groups (i.e., Buddhism, Protestantism, and Islam). Then, we developed an item pool based on themes that emerged from these qualitative data. In the second phase, participants (N = 1055) were randomly split into two subsamples. Exploratory factor analyses were performed on the first subsample (N = 519) to select the scale items. The nine-item RPS subsequently includes two dimensions—Zealous Religious Dedication and Religious Self-Criticism. Confirmatory factor analyses (CFA) were performed on the second subsample (N = 536) to cross-validate the factor structure. Results indicate that the internal consistency reliability for the RPS subscale scores was all adequate. Furthermore, the construct validity of the RPS was supported through its correlations with measures of perfectionism perceived to have come from God (or a higher power), psychological indicators, and a personality variable (i.e., discipline) in expected directions. Results of the psychometric evaluations of this newly developed scale suggest that the RPS is a promising measure in that it can facilitate future research that leads to a more comprehensive understanding of the impact of religious perfectionism on psychological well-being.
