[目的/意义]失真健康信息极具流行性和破坏性，仅靠算法和专家甄别已经难以完全应对社交媒体中日益严重的失真健康信息问题。个体主动验证信息被证明是打击失真健康信息的有效举措，研究如何提升社交媒体用户分享前验证健康信息的积极性意义重大。[方法/过程]基于计划行为理论构建研究模型，探索社交媒体中用户分享前验证意向的影响因素，通过调查样本，对文中提出的模型进行实证检验。[结果/结论]社交媒体用户的分享前验证意向显著受到五种因素的正面促进作用。具体而言，健康信息验证能力的提升与意识的增强共同增强了用户的感知行为控制；同时，意识的提升、讨论异质性偏好以及第三人称感知的增强均对用户的态度产生了积极影响；此外，感知社会支持的增强也强化了主观规范。进一步分析表明，感知行为控制、态度及主观规范三者协同作用，显著提升了用户的分享前验证意向。但是，感知信息过载会负向调节感知行为控制和分享前验证意向之间的关联。研究结果加深了对用户健康信息验证行为的理解，并为各方开展失真健康信息治理提供新的见解。
[Purpose/significance] The increasing prevalence and pernicious impact of misinformation on social media present a formidable challenge for which algorithms and experts alone are increasingly inadequate. Research has dem⁃onstrated that proactive individual verification of information can effectively combat misinformation. Therefore, it is im⁃perative to investigate strategies to boost social media users' intention to verify information before sharing it. [Method/process] Based on the theory of planned behavior, this study aims to construct a model on the factors that influence us⁃ers' intention to verify before sharing on social media. An empirical test was conducted to validate the proposed model and all assumptions. [Result/conclusion] The results indicate that five factors fundamentally influence users' verifica⁃tion intention before sharing on social media. Specifically, competency and awareness enhance perceived behavioral control, while awareness, discussion heterogeneity preference, and third-person perception increase attitudes, and per⁃
ceived social support strengthens subjective norms. Furthermore, perceived behavioral control, attitudes, and subjec⁃tive norms strengthen verification intention before sharing. Subjective norms also indirectly promote verification inten⁃tion by promoting attitudes. However, perceived information overload negatively moderates the association between per⁃ceived behavioral control and verification intention before sharing. The findings deepen the understanding of users' health information verification behaviour and provide new insights for stakeholders in health misinformation gover⁃nance.
