突发公共危机中伪信息扩散中的影响力群体效应分析

Group Effect in Spreading Network of Fake Information in Public Crisis

在公共危机中,识别社会群体的影响力是掌握信息扩散特性进而有针对性采取干预措施的重点。基于问卷调查数据,利用Cox风险比例模型构建了信息扩散网络中群体影响力和易感性的单因素和二元关系模型。通过问卷的样本估计得出,23～30岁的个体最容易受到31～45岁的个体的影响;异性之间的影响力强于同性之间,且男性的影响力更大;高强度社会关系对于低强度社会关系的影响力要大于同等强度的社会关系;此外,公共媒介信息对于人们采取行动具有显著性的影响,且影响力随年龄的递增而增加。为了控制伪信息的扩散,政府的引导性政策应该借助影响力较强的群体,进而影响其他群体。

In public crisis,the recognition of the influence of social groups is the key to grasping the characteristics of information diffusion and taking targeted intervention measures.Based on the questionnaire survey,this paper built the single factor and the two element model of group influence and susceptibility in information diffusion network by using the Cox risk ratio model.The sample questionnaires show that individuals between the ages of23and30are the most susceptible to individuals between31and45;the influence between the opposite sex is stronger than that of the same sex,and the influence of men is even greater^and high-intensity social relations have a greater influence on low- intensity social relations than on the same intensity.In addition,and more importantly,public media information has a significant influence on people to take action,and the influence increases as the age increases.In order to control the spread of false information,the guiding policies of the government should make use of the more influential group to influence other groups.