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    社交媒体内容可信性分析与评价

    Evaluation of Content Credibility in Social Media

    • 摘要: 近年来社交媒体在拓宽人们获取信息渠道的同时,也方便了虚假信息的传播,并造成了严重的负面影响.与传统互联网媒体相比,社交媒体包含的信息更加复杂多样,为内容可信性的判断带来了新的挑战.已有研究在分析社交媒体内容可信性时,对挖掘可信性影响因素进行了很多工作,但缺乏对噪音数据的处理,大量的无用推文会对推文可信性判断造成干扰,进而会影响事件层面的可信性判断,从大量噪音数据中筛选出真正有用的推文数据就显得尤为重要.在推文层面同时考虑用户的主题因素和从众行为,减少了从众转发等噪音数据在可信性判断过程中的作用,对社交媒体内容的可信性进行研究,采用贝叶斯网络建立了社交媒体内容可信性评价模型,并通过新浪微博公开数据集验证了模型的有效性.

       

      Abstract: With the rapid development of social media in recent years, the access to information has been broadened, but the spreading of incredible information has been facilitated at the same time, which brings a series of negative impacts to cyber security. Compared with the traditional online media, the information in social media is more open and complicated, giving rise to great challenges to judge online information credibility for individuals. How to filter the incredible information becomes an urgent problem. In the existing research on the assessment of information credibility in social media, lots of effort has been involved in extracting the useful factors for credibility assessment, but the processing of noisy data is neglected, and a large number of useless tweets can be included in the evaluation process, resulting in the deviation of the information credibility assessment. So it is particularly important to select the significant tweets for information credibility assessment. This paper takes the topic factor and conformity of users into consideration to relieve the impact of noisy data, such as conformity retweeting, on information credibility assessment, and uses Bayesian network to establish an evaluation model for information credibility in social media. Then we verify the effectiveness of our model using a real dataset.

       

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