Scale Overview
The Religiosity of Islam Scale – RIS was developed by Jana-Masri & Priester (2007). It is designed to measure Islamic Religiosity. The scale is intended for use with Muslim adults.
Scale Structure
This instrument consists of 19 items organized into 2 factors/subscales: Islamic Beliefs, Islamic Behavioral Practices.
| Factor / Subscale |
Items |
N |
| Islamic Beliefs |
4,6,8,9,11,12,13,16,18 |
9 |
| Islamic Behavioral Practices |
1,2,3,5,7,10,14,15,17,19 |
10 |
Response Format
Respondents rate each item using a custom response format.
Response anchors: Practices: 1 = Always, Practices: 2 = Usually, Practices: 3 = Sometimes, Practices: 4 = Rarely, Practices: 5 = Never, Beliefs: 1 = Strongly agree, Beliefs: 2 = Mostly agree, Beliefs: 3 = Somewhat agree, Beliefs: 4 = Neither agree nor disagree, Beliefs: 5 = Somewhat disagree, Beliefs: 6 = Mostly disagree, Beliefs: 7 = Strongly disagree.
The scale includes 5 reverse-scored items to reduce acquiescence bias.
Scoring
Items are scored by subscale, with each subscale sum representing a distinct dimension.
Total scores range from 9 to 63. Interpretation guidelines:
- Islamic Beliefs Subscale Score Range (Lower scores indicate higher religiosity before reverse-scoring adjustments): 9 – 63
- Islamic Behavioral Practices Subscale Score Range (Lower scores indicate higher religiosity before reverse-scoring adjustments): 10 – 50
Psychometric Properties
Internal Consistency: The scale has demonstrated good to excellent internal consistency with reported Cronbach’s alpha values of Islamic Beliefs subscale alpha: 0.66, Islamic Behavioral Practices subscale alpha: 0.81.
Administration
The scale is self-administered and typically takes approximately 10 minutes to complete. It can be administered individually or in group settings. No special training is required for administration.