关键词: 谣言传播, 社交网络, 破窗效应, 责任分散效应

Abstract: In social networks, the spread of rumors is always influenced by individual cognitive psychology and social environment, thus showing certain social effects. An SHIR (susceptible-hesitated-infected-removed) rumor propagation model is established, and the broken windows theory and diffusion of responsibility effect in rumor propagation are characterized from the perspective of individual features. This paper studies the threshold of the spreader in which two kinds of social effects play the biggest role. The influence of broken windows theory and diffusion of responsibility effect on rumor propagation in social network is simulated and analyzed based on BA(Barabási-Albert) scale-free network. Results show that: with the increase of the thresholds of spreaders in small-scale low density network, the propagation peak value under broken windows theory overall monotonically decreases which tends to the peak value without social effects, while the propagation peak value under diffusion of responsibility effect overall monotonically increases which tends to the peak value without social effects; the best threshold of spreaders under broken windows theory in SHIR rumor spreading model is 0.08, while the best threshold of spreaders under diffusion of responsibility effect is 0.07; the peak value of rumor spreading under broken window theory increases by 58.2%, and decreases by 69.9% under diffusion of reponsibility effect, thus the broken windows theory can promote the spreading of rumors, while the diffusion of responsibility effect will inhibit the spreading of rumors in social network.

Key words: rumor spreading, social network, broken windows theory, diffusion of responsibility effect