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Expert sources and one-sided messages influence e-cigarette health message perceptions among young adultsExpert sources and message types impact how people view vaping

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Key Takeaway
Note that expert sources and one-sided messages significantly influence perception of e-cigarette health risks.

This randomized controlled trial utilized an online experimental design involving 802 young adults to evaluate the impact of message sidedness (one-sided vs. two-sided) and source type (expert vs. peer) on perceptions of e-cigarette health messages.

Results indicated that expert sources elicited significantly higher trust than peer sources (p <.001). Furthermore, expert-delivered messages resulted in more positive message perceptions compared to peer-delivered messages (p =.048). Regarding message structure, one-sided messages elicited a greater perceived threat to freedom among current vapers (p <.001) and more positive e-cigarette attitudes than two-sided messages (p =.037). Conversely, two-sided messages elicited greater anger than one-sided messages among those who ever vaped (p =.041).

Trust levels were highest for the FDA and lowest for influencers across all vaping status groups (p <.001). No safety data or adverse events were reported. The study measures perceptions of messaging rather than actual behavioral changes or physiological outcomes. These findings suggest that tailoring message design based on audience vaping status may influence the effectiveness of prevention and cessation campaigns.

When trying to reach young adults about nicotine dependence, the way a message is delivered matters just as much as the content itself. A study of over 800 young adults found that people consistently trust experts more than peers when it comes to e-cigarette health information. Interestingly, messages delivered by experts were also perceived more positively overall.

However, the structure of the message creates different reactions depending on who is listening. For current vapers, one-sided warnings—which focus only on risks—actually led to more positive attitudes toward e-cigarettes and a higher sense of threat to their personal freedom. In contrast, two-sided messages, which acknowledge both risks and benefits, triggered more anger among those who had ever tried vaping.

These findings suggest that the best way to reach people depends on their current habits. While experts are generally trusted more than influencers or peers, the specific framing of a message can unintentionally backfire if it makes the audience feel defensive. Because this study measured how people perceived messages rather than actual changes in behavior, these results offer a roadmap for crafting better public health campaigns.

What this means for you:
Expert-led messages are trusted more, but one-sided warnings may cause current vapers to feel defensive.

Study Details

Study typeRct
EvidenceLevel 2
PublishedJun 2026
View Original Abstract ↓
INTRODUCTION: This study examined how message sidedness (one-sided vs. two-sided) and source (expert vs. peer) influence young adults' perceptions of e-cigarette heath messages, with attention to differences between those who currently vape, those who ever vaped and never vaped. METHODS: We conducted a 2 (sidedness) x 2 (source) online experiment with a sample of young adults (n = 802, Mage = 21.49). Participants were randomly assigned to view 18 messages about the health effects of vaping. After each message, they rated message and source perceptions. Following exposure to all messages, they completed measures assessing e-cigarette attitudes, risk beliefs, behavioral intentions, and demographics. Generalized linear models were used to examine the effects of message conditions and vaping status on outcomes, adjusting for demographics. RESULTS: Participants reported higher trust in experts than peers (p<.001) and more positive message perceptions from expert-delivered messages (p=.048). One-sided messages elicited greater perceived threat to freedom (p<.001) and more positive e-cigarette attitudes than two-sided messages (p=.037) among those who currently vape. Two-sided messages elicited greater anger than one-sided messages among those who ever vaped (p=.041). Participants who never vaped, ever vaped, and currently vape reported the highest trust in the FDA (ps < 0.001) and the lowest trust in influencers (ps < 0.001). CONCLUSIONS: Tailoring message design to audience's vaping status can strengthen e-cigarette health messages. Expert sources may be more effective in prevention campaigns, while two-sided messages may enhance cessation efforts. Results show that message source and sidedness interact with vaping status to meaningfully shape message perceptions. IMPLICATIONS: This study highlights the importance of tailoring e-cigarette health messages to young adults' vaping status. Health experts (ie, FDA and medical school researchers) are viewed as more credible than peers, underscoring their value as message sources. Additionally, message sidedness plays a critical role: compared to one-sided messages, two-sided messages that acknowledge reasons for vaping resonate more with those who currently vape, while one-sided messages that only present information resonate more with those who ever vaped. These insights can guide the design of targeted public health campaigns, informing both vaping prevention strategies for those not vaping and cessation efforts for those currently vaping, ultimately enhancing campaign effectiveness across diverse young adult populations.
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