关键词: 科学传播, 机制, 社会网络分析, 微博客, 转基因食品

Abstract: Scientific information on the platform of microblog communicates through social relations. Based on the relations among microblog users, such as following, forwarding, commenting and so on, communication network forms, whose structure determines the sources, direction, strength and coverage of information. Quantitative investigation on the structure of this network with the methodology of social network analysis (SNA) provides a new structuralism approach for mechanism studies of science communication with microblog. Structure analysis of communication network could be conducted at four levels, including the structure of whole network, individual position, and sub-network as well as the interaction between sub-networks. The case study of the issues of Genetically Modified food indicates that, 1) public scientific issues communicate through multi-interactional channels in microblog space; 2) the relationship among relevant communicators presents some characteristics of elite-democracy, and 3) actors involved would probably polarize into different groups.