Islamic Behavioral Religiosity Scale – Modified (IBRS)
Measures Islamic religiosity across doctrinal orthodoxy, intrinsic religiosity, and extrinsic religiosity dimensions.
Scale Development & Technical Details
Scale Overview
The Islamic Behavioral Religiosity Scale – Modified (IBRS) was developed by Chang-Ho C. Ji, Yodi Ibrahim, Mariam Abou-Youssef, Wael Kortam, Ehab Abou-Aish, Noha El-Bassiouny (2011). It is designed to measure Islamic Religiosity. The scale is intended for use with Muslim adults.
Scale Structure
This instrument consists of 30 items organized into 3 factors/subscales: Islamic Doctrinal, Intrinsic Religiosity, Extrinsic Religiosity.
| Factor / Subscale | Items | N |
|---|---|---|
| Islamic Doctrinal | 1,2,3,4,5,6,7,8 | 8 |
| Intrinsic Religiosity | 9,10,11,12,13,14,15,16,17,18,19,20,21 | 13 |
| Extrinsic Religiosity | 22,23,24,25,26,27,28,29,30 | 9 |
Response Format
Respondents rate each item using a 5-point Likert scale (1 = Strongly Disagree to 5 = Strongly Agree).
The scale includes 3 reverse-scored items to reduce acquiescence bias.
Scoring
Items are scored by subscale, with each subscale sum representing a distinct dimension.
Psychometric Properties
Internal Consistency: The scale has demonstrated good to excellent internal consistency with reported Cronbach’s alpha values of Overall Cronbach's alpha: 0.847; Islamic Doctrinal: 0.991; Intrinsic Religiosity: 0.902; Extrinsic Religiosity: 0.842.
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.