The system of belief inventory (SBI-15): a validation study in Israel.

This study focused on the validation of measures assessing religiosity by means of three self-report instruments: the System of Belief Inventory (SBI-15R), the Religious Orientation Inventory (ROI), and the Index of Core Spiritual Experiences (INSPIRIT). These instruments were developed and validated previously in the United States. The study measured the extent to which the self-reports maintain their validity when administered in a different country with its own distinct language, culture and religion (e.g. Israel). It was found that all three self-reports have very good external validity and high convergent reliability, with the SBI demonstrating extremely high internal reliability.