关键词: 谣言, 传播行为, 在线社会网络, 演化博弈

Abstract: Nowadays, online social network has become the main channel of rumor spread. Based on the theory of evolutionary game, this paper takes rumor spreaders and rumor receivers as game participants, takes the different behavior choices of the above two types of users when facing rumors as different strategies in the game, and takes the profit function of the two types of users when choosing different strategies as the utility function of the game to analyze the rumor spreading process in the social network. This paper holds that there are three influencing factors affecting the utility function of game participants in rumor spread, namely, the self-knowledge reserve, reputation and influence of the participants in rumor spread. Whether the rumor spreader chooses to participate in the spreading or not, and whether the receiver chooses different strategies to comment on the spreader' s informa-tion, will affect three independent variables and further affect the participants themselves'revenue function. The results show that when the proportion of knowledge reserve in the network is large, rumor dissemination will be inhibited. When rumor participants pay more attention to their own influence, it will be conducive to rumor dissemination. This study will help us to understand the internal mechanism of rumor spreading on social networks more deeply, and then provide a strong theoretical basis for curbing rumor spread.

Key words: rumor, spreading behavior, online social network, evolutionary game theory