Pandemic control not only requires effective COVID-19 vaccines but also that they are accepted by at least 80% of the population. For this reason, understanding the social psychological variables associated with vaccination intent is essential to achieve herd immunity. Drawing on the theory of reasoned action, this study seeks to analyze vaccination intent using the beliefs about vaccine effectiveness, conspiracy theories, and injunctive norms as predictors. A non-probabilistic national online survey was conducted during December 2020. A sample of 1,033 people in Chile answered a questionnaire with the study variables. Using structural equation models, it was found that vaccination intent was explained in 62.1% by beliefs about vaccine effectiveness and injunctive norms, controlling for age, political orientation, socioeconomic status, educational level, and gender. Specifically, beliefs about vaccine effectiveness are based on people's experience with previous immunization processes, which predict vaccination intent. Regarding injunctive norms, they act by influencing and encouraging vaccination by seeking the approval of significant others. Contrary to expected, conspiracy beliefs were not directly associated with the intention to receive a COVID-19 vaccine but were highly related to lower beliefs about vaccine effectiveness. This study suggests that to enhance the vaccination intent, socio-psychological and structural variables need to be considered.

大流行控制不仅需要有效的 COVID-19 疫苗，而且还需要至少 80% 的人口接受它们。因此，了解与疫苗接种意图相关的社会心理变量对于实现群体免疫至关重要。本研究利用理性行动理论，试图使用关于疫苗有效性的信念、阴谋论和禁令规范作为预测因子来分析疫苗接种意图。2020 年 12 月期间进行了一项非概率性全国在线调查。智利的 1,033 人样本回答了包含研究变量的问卷。使用结构方程模型发现，62.1% 的疫苗接种意图可以通过对疫苗有效性和禁令规范的信念来解释，控制年龄、政治取向、社会经济地位、受教育程度和性别。具体来说，关于疫苗有效性的信念是基于人们对先前免疫过程的经验，这些经验可以预测疫苗接种的意图。关于禁令性规范，他们通过寻求重要他人的批准来影响和鼓励疫苗接种。与预期相反，阴谋信念与接受 COVID-19 疫苗的意图没有直接关系，但与对疫苗有效性的较低信念高度相关。这项研究表明，为了增强疫苗接种意图，需要考虑社会心理和结构变量。他们通过寻求重要他人的批准来影响和鼓励接种疫苗。与预期相反，阴谋信念与接受 COVID-19 疫苗的意图没有直接关系，但与对疫苗有效性的较低信念高度相关。这项研究表明，为了增强疫苗接种意图，需要考虑社会心理和结构变量。他们通过寻求重要他人的批准来影响和鼓励接种疫苗。与预期相反，阴谋信念与接受 COVID-19 疫苗的意图没有直接关系，但与对疫苗有效性的较低信念高度相关。这项研究表明，为了增强疫苗接种意图，需要考虑社会心理和结构变量。