The Limits of Fear Appeals

This paper studies how different intensities of fear appeal in anti-alcohol campaigns affect perceived trust, message credibility, and the likelihood of quitting alcohol consumption. As public trust in health institutions continues to decline, due to disinformation and crises such as the COVID-19 pandemic, the effectiveness of emotional persuasion in health communication has become of utmost importance. Drawing on the Extended Parallel Process Model (EPPM) and the Transtheoretical Model of behaviour change, this study uses a quantitative, between-subjects experimental design to explore whether different levels of fear intensity (low, moderate, high) influence viewer responses. A total of 140 participants, primarily young European adults, were randomly assigned to view one of three anti-alcohol campaign posters, each reflecting a distinct level of fear appeal. Following exposure, participants completed validated scales measuring trust (ADTRUST), message credibility (Appelman's Message Credibility Scale), and likelihood of quitting (SOCRATES Personal Drinking Questionnaire). The findings were analysed using one-way ANOVA to test three hypotheses: that high fear reduces trust (H1), moderate fear increases credibility (H2), and moderate fear increases quitting intentions (H3). The results offer only partial support for H1: perceived trust was significantly lower in the high-fear condition compared to the low-fear condition, but there was no significant difference between high and moderate fear. Neither H2 nor H3 were supported, as no statistically significant differences were found in message credibility or likelihood of quitting across fear conditions. These findings challenge assumptions in the literature that moderate fear offers optimal persuasion and suggest that fear alone may not meaningfully influence trust, credibility, or behavioural intentions unless accompanied by other factors, such as efficacy cues or message realism. The study contributes to both academic and practical discussions on the ethical and strategic use of fear in health messaging. It proves that public health campaigns relying heavily on fear appeal must balance emotional impact with rationality and credibility. The findings highlight the importance of personalising campaigns to audience characteristics such as age, media literacy, and trust in institutions. In conclusion, Fear-based messages remain a common tool in anti-alcohol campaigns. However, this research urges a deeper investigation into persuasion techniques and the many layers and factors that go into making them effective, in order to optimise public health communication.