Do metaphors in health messages work? Exploring emotional and cognitive factors

Health communicators publicize messages that use metaphors to compare abstract health-related concepts to concrete concepts in other domains. Such messages aim to change health attitudes and behavior, but do they work? According to Conceptual Metaphor Theory, metaphors can shape thought by transferring personalized knowledge of a concrete concept to understand and relate to an abstraction, despite their superficial differences. The authors extend this claim to specify emotional and cognitive factors potentially moderating the productivity (and counter-productivity) of metaphoric health messages. A source resonance hypothesis predicts that when a message frames a health risk metaphorically in terms of a concrete hazard (versus literally), individual differences in fear surrounding that particular hazard will differentially predict risk-related worry and thus prevention intentions. A metaphoric fit hypothesis predicts that a risk metaphor will be more persuasive when the recommended prevention response is itself framed metaphorically as addressing the concrete hazard (versus literally). These hypotheses were supported in three experiments conducted with online, undergraduate, and community samples (N=539). With skin cancer as a case study, the studies tested the impact of messages framing sun exposure and sun-safe practices with or without metaphors of enemy combat. Findings illuminate how, when, and for whom metaphoric messages are persuasive, with theoretical and practical implications for health communication and metaphoric construal.