Abstract
To evaluate the efficacy of obesity prevention campaigns targeting adolescents, a controlled experiment with 797 underprivileged high and middle school students was conducted. Participants were exposed to different prevention messages and their eating behavior (choice of a snack) and intentions to monitor food intake were measured. Results demonstrate that obesity prevention advertisements using social risks lead to a healthier food choice in comparison with advertisements using the health risk. The efficacy of the message regulatory orientation (prevention vs. promotion) to change intentions to monitor food intake varies according to the type of argument used (social vs. health): The health argument is more effective when it highlights the risks of having an unbalanced diet than when it highlights the benefits of a balanced diet. These results question the efficacy of current prevention campaign strategies.
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