风险感知和社会支持对民众防护行为的影响：社会信任和应对效能的中介作用

he outbreak of the COVID-19 in Wuhan China has characterized as a "pandemic" by WHO as the virus spreads increasingly worldwide. As the worst public health incident since new millennium, the COVID-19 is severely threatening human's health and lives. At the same time, the epidemic of COVID-19 has also caused worry and panic among the affected people. A series of chain reactions caused by this negative emotion will further aggravate the destructiveness of the epidemic of COVID-19. Therefore, providing psychological and social support to the people affected by the epidemic event and meeting their psychological and social needs can effectively help the affected people to gradually resume normal social life, improve satisfaction and comfort, and get them out of the epidemic as soon as possible. As General Secretary Xi Jinping pointed out,The current situation of epidemic prevention and control is severe and complicated. Some people have anxiety and fear. Publicity and public opinion work must be strengthened to guide people to increase their confidence, strengthen their confidence, and focus on stabilizing the public s mood.This study explored the impact of the public's epidemic risk perception on their protective behavior, and the mediating role of social trust and coping efficacy between the public's epidemic risk perception and protective behavior during the outbreak of the COVID-19. The results found that:(1)The public's epidemic risk perception is at a moderately high level, and the public has taken proactive protective actions against the COVID-19. (2)The public's affective risk perception social support have a direct predictive effect on the protective behaviors of positive actions and the plan to solve. (3)The public's social trust and coping efficacy play a partial mediating role between affective risk perception and protective behavior; The public's social trust and coping efficacy play a complete mediating role between cognitive risk perception and protective behavior; The public's social trust and coping efficacy play a partial mediating role between social support and protective behavior.