The spreading of misinformation and disinformation is a great problem on microblogs, leading user evaluation of information credibility a critical issue. This study incorporates two message format factors related to multimedia usage on microblogs (vividness and multimedia diagnosticity) with two well-discussed factors for information credibility (i.e., argument quality and source credibility) as a holistic framework to investigate user evaluation of microblog information credibility. Further, the study draws on two-factor theory and its variant three-factor lens to explain the nonlinear effects of the above factors on microblog information credibility. An online survey was conducted to test the proposed framework by collecting data from microblog users. The research findings reveal that for the effects on microblog information credibility: (1) argument quality (a hygiene factor) exerts a decreasing incremental effect; (2) source credibility (a bivalent factor) exerts only a linear effect; and (3) multimedia diagnosticity (a motivating factor) exerts an increasing incremental effect. This study adds to current knowledge about information credibility by proposing an insightful framework to understand the key predictors of microblog information credibility and further examining the nonlinear effects of these predictors.

错误信息和虚假信息的传播是微博上的一个大问题，导致用户对信息可信度的评估是一个关键问题。这项研究结合了与微博上多媒体使用相关的两个消息格式因素（活动性和多媒体诊断性）以及两个经过充分讨论的信息可信度（即论据质量和来源可信度）因素，作为研究用户对微博信息可信度评估的整体框架。此外，该研究利用两因素理论及其变体三因素镜头来解释上述因素对微博信息可信度的非线性影响。通过从微博用户那里收集数据，进行了在线调查以测试建议的框架。研究发现表明，对于微博信息可信度的影响：（1）论据质量（一种卫生因素）起着逐渐减小的作用；（2）来源可信度（一个二价因素）仅表现出线性效应；（3）多媒体诊断（一种激励因素）发挥了越来越大的增量作用。这项研究提出了一个有洞察力的框架，以了解微博信息可信度的关键预测因素，并进一步检查这些预测因素的非线性影响，从而增加了有关信息可信度的当前知识。