With the COVID‐19 pandemic recognized as a major threat to human health is of paramount importance to improve the vaccination uptake of the future COVID‐19 vaccine. The study extended the health belief model (HBM) using insights from trait theory and events systems theory, to examine the role of beliefs in predicting intentions to be vaccinated against COVID‐19, when a vaccine becomes available. Employees from Greece (N = 1006) participated from October 1 to November 5, 2020, in an anonymous online factorial survey experiment. Measures of dispositional optimism, faith in intuition, risk‐taking propensity, and acquiring resources mindset were included as individual difference variables. Multilevel modeling techniques were used for data analyses. Components of HBM had significant effects on intentions to vaccinate. Two‐way interactions between severity and susceptibility beliefs and three‐way interaction among perceived severity, susceptibility, and perceived benefits were detected. In line with the events systems theory, a critical event moderated beliefs' effects on intention to vaccinate. Acquiring resources mindset emerged as important individual difference that positively related to intentions. The model explained 59 per cent of the variance in vaccination intentions. The study highlighted interaction effects among the HBM components and how critical events may moderate belief effects.

中文翻译：

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健康信念模型预测针对 COVID-19 的疫苗接种意图：一种调查实验方法

随着 COVID-19 大流行被认为是对人类健康的主要威胁，对于提高未来 COVID-19 疫苗的疫苗接种率至关重要。该研究利用特质理论和事件系统理论的见解扩展了健康信念模型 (HBM)，以检查当疫苗可用时信念在预测接种 COVID-19 疫苗的意图中的作用。来自希腊的员工（N = 1006) 于 2020 年 10 月 1 日至 11 月 5 日参加了一项匿名的在线因子调查实验。性格乐观、对直觉的信心、冒险倾向和获取资源的心态被纳入个体差异变量。多级建模技术用于数据分析。HBM 成分对疫苗接种意向有显着影响。检测到严重性和易感性信念之间的双向交互作用以及感知严重性、敏感性和感知利益之间的三向交互作用。根据事件系统理论，一个关键事件缓和了信念对疫苗接种意图的影响。获取资源心态成为与意图正相关的重要个体差异。该模型解释了 59% 的疫苗接种意图差异。该研究强调了 HBM 组件之间的相互作用效应以及关键事件如何调节信念效应。