The present study investigated 2-wk. test-retest reliability of the Duke Religion Index, a 5-item self-report questionnaire that assesses organizational, nonorganizational, and intrinsic religiosity. The sample consisted of 20 undergraduate college students (11 women) whose mean age was 24.7 yr. (SD=5.0 yr.). Findings supported the 2-wk. test-retest reliability of the Duke Religion Index with an intraclass correlation coefficient of .91.
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Storch et al. (2004) studied this question.
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