新冠肺炎疫情危机中的微信使用与利他行为: 风险感知与公共信任的中介效应

新冠肺炎疫情期间，微信成为公众获取疫情信息的最主要渠道。本研究从媒介使用视角出发，探究在武汉疫情防控“胶着对垒的关键时期”，聚焦于疫情信息的微信使用对武汉市民风险感知、公共信任及利他行为的影响机制。对1071位武汉市民的电话调查发现，公众对于微信上疫情信息的注意程度越高，其在社会层面的疫情风险感知与公共信任越强，践行遵从配合与助人帮扶两种利他行为的频率也越高。此外，风险感知与公共信任在微信使用对利他行为的影响机制中具有中介作用。

During the outbreak of COVID-19, WeChat has become the main channel for the public to access epidemic information. From media use perspectives, this study aims to explore how reliance on WeChat epidemic information affects people’s risk perception, public trust and altruistic behavior at the critical juncture of the fight against the virus. A telephone survey of 1,071 Wuhan residents indicates that increased attention paid to epidemic information on WeChat resulted in not only stronger social-level risk perception and public trust, but also more compliance and help-giving behavior. Additionally, risk perception and public trust are found to mediate the association between WeChat use and altruistic behavior.