Abstract
The Belief into Action Scale (BIAC) is a comprehensive measure of religious involvement intended for monotheistic religious traditions. We examine the psychometric properties of an Arabic version of the BIAC for administration in Muslim populations. A convenience sample of Arabic-speaking Muslims completed an online survey including the 10-item Arabic BIAC and other psychosocial and religious measures. Psychometric properties of the BIAC were examined, including internal reliability, test-retest reliability, convergent validity, discriminant validity, and factor analytic validity. Two hundred and eleven participants completed the BIAC (100% Muslim, average age 31.9, 54% male). The average score was 47.6 (SD = 15.7). Cronbach alpha was .80 (95% CI .76-.84) and intra-class correlation coefficient between two administrations (n = 30) was .88 (95% CI .77-.94). Convergent validity was demonstrated by high correlations between the BIAC and existing religiosity scales (r = .52-.58); divergent validity by weak correlations with psychosocial measures (.09-.21); construct validity by high correlations between individual items and total scale score (r's .53-.72); factor analytic validity by a single factor that explained 81.8% of the scale's variance and predictive validity by small correlations with psychosocial outcomes in expected directions. The Arabic BIAC is a reliable and valid scale for assessing religious involvement in Muslim Arabic-speaking populations.