*6.2. Theoretical Contributions*

This study offers several theoretical contributions. First, this study evaluated the effect of DCTA overuse on promoting continuous cooperation with the government for COVID-19 prevention in a large-scale, mandatory-use environment and clarified the mechanism by which DCTA overuse promotes people's cooperation with the government for disease prevention from a psychological perspective, thus enriching the literature on the effectiveness of DCTAs in disease prevention. Second, this study validated the issue of the feasibility of the NAM model in explaining people's pro-social behavior in epidemics; it also verified that the overuse of digital health technology is an antecedent that triggers users to develop awareness of the consequences and ascription of responsibility, which expands the field of the use of the NAM and helps subsequent studies to apply it to investigate the impact of digital health technology on user psychology. Finally, this study verified the existence of a moderating effect of negative factors on the intrinsic mechanisms of the NAM model by analyzing the effects of perceived life inconvenience, which enriches the connotation of the NAM.
