Abstract:The opinion leaders in social networks are not polycentric or diversified, but have created a convergent structure of “concentric circles”. Taking the influence of the opinion leaders as an independent variable, we find that with their increasing influence the opinion leaders create a convergent structure of “concentric circles” with one center, three convergence supports and gradual convergent circles. The opinion leaders are “social models” in the center of the convergent structure. Their influence is positively related to how much they are convergent with the “social models” in the center. In this process, concentric circles are formed around the center. The closer to the center, the denser the circles, and vice versa. Taking Sina Weibo, one of the typical social networks, as a sample, we tested our hypotheses. The research bears out our conception of the “concentric circles”. First, the influence of the opinion leader is positively correlated with his distance from the “social model” in the center, and thus the opinion leader is ready to get closer to the network center. Second, in the process of users converging to the central social model, there is a positive correlation and isomorphism between the influence of the opinion leader and influence of the “social model”. Third, the extent to which a network user is taken as a social model is positively related to how much his opinion is similar to the social model in the center, showing that the “social model” is located only in the center, and that it is homogeneous rather than diverse. Fourth, with their opinion leader moving to a higher level, the users get more convergent within their hierarchy, and thus the user influence gets more coherent and narrower. The convergence and the “concentric circles” of the opinion leader users show that the decentralized network era is re-centralized, and a “one-dimensional” society is coming into being in the “Balkanization” era of network.
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