Collantes-Loo Jimena, Bravo Edgardo R
Faculty of Life Sciences, Universidad de Ciencias Aplicadas, Lima, Peru.
Engineering Department, Universidad Del Pacífico, Lima, Peru.
Front Public Health. 2025 Jun 12;13:1609127. doi: 10.3389/fpubh.2025.1609127. eCollection 2025.
The global COVID-19 pandemic has highlighted the importance of maintaining public engagement with vaccination programs through effective health communication, particularly as initial crisis awareness fades. This study develops and validates an integrated model of vaccination behavior by combining the Theory of Planned Behavior, the Protection Motivation Theory, and the Structural Influence Model of Health Communication with health communication dimensions.
Using partial least squares analysis of survey data from 320 U.S. adults, the research examines how message components influence cognitive appraisals (threat and response efficacy) and how this relationship is moderated by information-seeking behavior, information processing ease, and trust in government.
Results confirm the core relationships of the Theory of Planned Behavior in vaccination contexts while revealing a temporal evolution in risk appraisals, with severity and susceptibility showing diminished effects on attitudes. While message components show non-significant direct effects on appraisals in the aggregate sample, these relationships become significant among high information seekers and those with greater trust in government. Additionally, vulnerability-focused messages have differential effects based on chronic health status, positively impacting risk perceptions among vulnerable populations while reducing perceived susceptibility in others.
These findings advance the theoretical understanding of health communication and suggest implementing segmented communication strategies based on audience characteristics.
全球新冠疫情凸显了通过有效的健康传播来保持公众对疫苗接种计划参与度的重要性，尤其是在最初的危机意识消退之后。本研究通过将计划行为理论、保护动机理论以及健康传播的结构影响模型与健康传播维度相结合，开发并验证了一个疫苗接种行为的综合模型。
利用对320名美国成年人的调查数据进行偏最小二乘法分析，该研究考察了信息成分如何影响认知评估（威胁和反应效能），以及这种关系如何受到信息寻求行为、信息处理难易程度和对政府信任度的调节。
研究结果证实了计划行为理论在疫苗接种情境中的核心关系，同时揭示了风险评估的时间演变，严重性和易感性对态度的影响减弱。虽然信息成分在总体样本中对评估的直接影响不显著，但在高信息寻求者和对政府信任度较高的人群中，这些关系变得显著。此外，以脆弱性为重点的信息根据慢性健康状况产生不同影响，对脆弱人群的风险认知产生积极影响，而在其他人群中降低了感知易感性。
这些发现推进了对健康传播的理论理解，并建议根据受众特征实施分段传播策略。
