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Glassman, Jill R.; Potter, Susan C.; Baumler, Elizabeth R.; Coyle, Karin K. – Health Education & Behavior, 2015
Introduction: Group-randomized trials (GRTs) are one of the most rigorous methods for evaluating the effectiveness of group-based health risk prevention programs. Efficiently designing GRTs with a sample size that is sufficient for meeting the trial's power and precision goals while not wasting resources exceeding them requires estimates of the…
Descriptors: Health Education, Longitudinal Studies, Correlation, Comparative Analysis
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Myers, Dennis R.; Wolfer, Terry A.; Garland, Diana R. – Religious Education, 2008
A research study surveyed 946 volunteers from congregations who were actively involved in community service, as well as 3,959 other congregational attenders who were not involved in volunteer service, to understand the relationship between service learning and faith development. Findings show that service-learning is powerfully related to a mature…
Descriptors: Community Leaders, Service Learning, Volunteers, Spiritual Development