Theoretical Studies And Empirical Analysis On Group Polarization Effect Of Online Community Participation In Public Decision-making

In recent years, the network has gradually becoming the main "base" for people to express their emotions and views, but because of the anonymity and randomness about web public opinion, netizens can express their opinions at will and the speeches mixed up. Moreover, China is in a period of social transition, various kinds of social thoughts and values agitate each other, a large number of social problems are not be effectively solved in time, netizens give vent to their dissatisfaction or disappointment via the Internet, they express their views to vent their dissatisfaction or disappointment, and then attack and abuse each other. The irrational elements of the web public opinions is very prominent, but very lack of rational analysis and calm discussions, "group polarization" phenomenon often occur, they has greatly hampered the normal order of the judicial running, and make the online community become the original place of influence social harmony and stability, very detrimental to national peace. Therefore, in recent years the network public opinion "group polarization" has becoming the concern of the government and scholars.This paper uses a combination method of literature survey and model simulation and empirical research to studies the group polarization phenomenon occurs when the online communities participation in public decision-making. Firstly, analyzes the thesis of the research status about the group polarization of network public opinion, in order to capture the overall theoretical roots, research focus and problems; On this basis, uses the cellular automata model for simulation studies on the spread of the network public opinion, taking into account the vagueness and uncertainty of information, introducing the fuzzy rule-based reasoning for model updating, and then use the Matlab simulation the evolution of individual and group views in network public opinion formation process, and give a detailed analysis of the cause of the group polarization phenomenon; Finally, in order to further validate the correctness of the above theoretical studies in the real environment, this paper collect and statistical analysis the posts about a specific topic from two hot BBS forum, using SPSS to verify the cause of the network community group polarization with the chi-square test and the correlation analysis method, attempt to explore the following aspects:①whether there is the group polarization phenomenon when the Internet users participate in the discussion of public decision-making? To what extent?②Is there a link between the Internet users group polarization phenomenon and its environment (such as the forums or plates characteristics)③Is there a link between the Internet users attitude polarization and their own characteristics(such as the number of posting or the threading)? and so on. Hope to provide effective countermeasures for government to guide netizens rational thinking, reduce the group polarization, and enhance the credibility of the government.