Challenges and opportunities for promoting booster seat use: progressive dissemination of a high-threat message.

Motivating parents to take certain safety precautions when traveling with their children remains challenging for advocates. Caregivers of booster-aged children are particularly difficult to reach because they do not consider their children to be of "safety-seat" age and have inherently low perceptions of vulnerability to crash injury. Unfortunately, most booster seat programs fail to adequately motivate their intended population because they are primarily informational in nature and rely on caregivers to seek out and attend to the information.