How Emotional Appeals in Health Promotion Messages and User-generated Comments Impact COVID-19 Vaccination Intention: The Mediating Role of Psychological Reactance

Abstract: To close existing research gap and combat vaccine hesitancy among young adults, we conduct this study to integrate psychological reactance theory to better understand the effectiveness of three emerging yet understudied emotional appeals (i.e., guilt, shame, and pride) in health risk context. The current research has two goals: (1) to examine how different emotional appeals (guilt vs. shame vs. pride) and user-generated comments toward COVID-19 vaccine messages independently or interactively affect psychological reactance and (2) to understand the mediating role of psychological reactance between emotional appeals and user-generated comments and desired behavioral outcomes. An experimental study with 3 (guilt vs. shame vs. pride) by 2 (positive-valenced comments vs. negative-valenced comments) between-subjects factorial design will be conducted with college students (aged 18-24) at a large public university in the United States. Our findings strengthen the theoretical foundation on how health risk messages with user-generated comments interactively can predict undesired health outcomes. Our study also helps health organizations design more effective messages targeting at young adults by lowering psychological reactance and enhancing persuasive power in motivating COVID-19 vaccination.


Virtual exemplars in health promotion campaigns: Heightening perceived risk and involvement to reduce soft drink consumption in young adults.

Abstract: Virtual simulations allow individuals to concretely view future negative health consequences of present dietary choices. Integrating exemplification theory with risk communication research, the effect of using virtual simulations to exemplify health risks of soft drink consumption was assessed across three weeks. A three-group pre-test, post-test, delayed post-test design (N= 62) compared the effect of three channelsof delivering health risk information—base-rate statistics, picture, and virtual simulation—embedded in a digital health promotion pamphlet. Three dimensions of risk perception (perceived likelihood, susceptibility, severity), involvement with the health issue, and soft drink consumption were measured across three weeks. Virtual exemplars were the most effective channel to increase perceived likelihood, perceived susceptibility, involvement, and soft drink consumption over time. Exemplification did not affect perceived severity. The paper discusses virtual exemplars’ potential as a powerful tool in designing effective health messages.