Radio-based entertainment education (EE) programs have long been a way to communicate health-related information, particularly in developing countries. To explore the effectiveness of these campaigns, we used meta-analysis to examine the results of 20 published studies on the effectiveness of health messages embedded in radio-based EE programs. The results suggest that these messages had small but significant effects in changing health related knowledge, attitudes, and behaviors. We also found that research methods, health issues, and exposure levels were significant moderators of these effects. These results have both theoretical and practical implications.
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