Measurement Invariance of Prayer Importance Scale: Religiosity, Gender, Age

The main goal of the research was to increase knowledge on psychometric properties Prayer Importance Scale (PIS). study analyzed structure test items using item response theory (IRT), Mokken scale analysis (MSA), and confirmatory factor (CFA) establish factorial method. Measurement invariance (MI) calculated in groups differentiated by three criteria: religiosity, gender, age. MI verifies whether measure construct same way across different groups. Structure Level Religiosity Test (SLRT) used examine level religiosity participants. In a conducted with sample n = 566 adults (Mage 49.16 years; SDage 15.72), two religious were identified based median distribution: low (n 275) high 291) levels religiosity. Two men 284) women 282), equivalent per age period: early (age 25–39; 192), middle 40–59; 187), late adulthood 60+; 187). Results analyses show homogeneity comprising PIS, as well strict for distinguished criteria. provide extended about PIS ability compare results due