Comparison of Indirect Sources of Efficacy Information in Pretesting Messages for Campaigns to Prevent Drunken Driving

Enabling publics to remove the constraints that prevent health enhancement is the focus of much scholarly research and professional practice. This experiment tested the impact of 2 forms of symbolic modeling and verbal persuasion on self-efficacy beliefs and intentions to prevent a friend from driving drunk. Three efficacy-enhancing public service announcements tested participants' beliefs in their confidence to intervene successfully. As predicted, behavioral and verbal modeling engendered greater perceived self-efficacy and behavioral intentions than did verbal persuasion, with behavioral modeling registering the greatest effects. Implications for designing campaigns of self-directed change to prevent drunken driving among college students are discussed, as well as possible directions for research on self-efficacy and the situational theory of publics.