This study aimed to investigate the relationship among risk perception, negative emotions, perceived government coping validity, and the sleep problem of the public, through regression analysis and mediation analysis of data from the early stages of the COVID-19 outbreak in China (three months after the outbreak). It found that people's perception of the risk of the pandemic, negative emotions, and perceived government coping validity significantly affected people's sleep quality and nightmares. Further analysis found that individuals' perception of risk not only affected their sleep but also intensified their negative emotions, ultimately impairing the quality of their sleep and leading to nightmares. However, having a high level of coping validity can mitigate negative emotions and consequently decrease the occurrence of nightmares, thereby enhancing the quality of sleep. Specifically, perceived government coping validity could not only directly reduce nightmares, but also indirectly reduce nightmares by lowering negative emotions. However, it could only indirectly improve sleep by reducing negative emotions. It implicated that improving and resolving sleep problems required not only medical intervention but also psychological intervention. Simultaneously, improving the government's response effectiveness could strengthen people's trust in the government, stabilize their mental states, and significantly improve their quality of life by reducing negative emotions and improving sleep.
Keywords: COVID-19 pandemic; nightmares; perceived government coping validity; risk perception; sleep quality.