How Authoritative Media and Personal Social Media Influence Policy Compliance Through Trust in Government and Risk Perception: Quantitative Cross-Sectional Survey Study

Background: Previous studies on public compliance with policies during pandemics have primarily explained it from the perspectives of motivation theory, focusing on normative motivation (trust in policy-making institutions) and calculative motivation (fear of contracting the disease). However, the social amplification of a risk framework highlights that the media plays a key role in this process. Objective: This study aims to integrate the motivation theory of compliance behavior and the social amplification of risk framework to uncover the "black boxes" of the mechanisms by which normative motivation and calculative motivation influence public policy compliance behavior through the use of media. Methods:During the COVID-19 pandemic, we conducted a web-based survey of 2309 Chinese citizens from December 4, 2022, to March 21, 2023. We treated the public's policy compliance behavior during the pandemic as the dependent variable. Media use, specifically the use of authoritative media and "we-media," that is, personal social media accounts and media platforms operated by individuals, was set as the independent variable. Trust in government, representing normative motivation, and risk perception, representing calculative motivation, were included as mediating variables. A structural equation model was constructed and analyzed using Stata. Results: First, the mediation effect of trust in government indicates that the use of authoritative media can enhance trust in government, which significantly increases individuals' policy compliance behavior (beta coefficient=0.108, 95% CI 0.080-0.135; P<.001). Second, the mediation effect of risk perception shows that the use of we-media heightened individual risk perception, thereby significantly enhancing policy compliance behavior (beta coefficient=0.012, 95% CI 0.002-0.021; P=.02). Third, the study revealed the "paradox of trust": the chain mediation effect in which authoritative media increased trust in government and reduced risk perception, ultimately decreasing policy compliance behavior (beta coefficient=-0.005, 95% CI -0.009 to -0.001; P=.008). Conclusions: By combining the motivation theory of compliance behavior with the social amplification of risk framework in risk communication, we found that trust in government, as a normative motivation, operates through authoritative media, while risk perception, as a calculative motivation, promotes compliance behavior through we-media. In addition, in major crises, the public's use of authoritative media can lead to the paradox of trust: on the one hand, trust in the government increases policy compliance; on the other hand, this trust reduces risk perception, thereby decreasing compliance behavior. Authoritative institutions need to balance providing authoritative information with maintaining the public's risk perception.