arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.03409cs.SIcs.CY
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一种通过推断的交互链接发现社交媒体中高度协调社区的通用方法

A General Method to Find Highly Coordinating Communities in Social Media through Inferred Interaction Links

Derek Weber, Frank Neumann

摘要:

政治错误信息,astroturfing和有组织的拖钓是具有重大现实世界影响的在线恶意行为。许多以前研究这些现象的方法都侧重于广泛的运动,而不是负责煽动或维持这些运动的小团体。为了揭示潜在的(即,隐藏)网络的合作帐户,我们提出了一种新的时间窗口的方法,依赖于帐户的交互和元数据单独。它检测参与各种行为的帐户组,这些行为一致地执行不同的基于目标的策略,其中一些我们描述。该方法依赖于从社交媒体帖子中提取相关元素的管道,基于与协调策略匹配的标准推断帐户之间的连接,以构建无向加权帐户网络,然后使用新的社区提取方法挖掘具有高水平协调证据的社区。我们解决的时间方面的数据,通过使用窗口机制,这可能是适合于近实时应用。我们进一步强调了跨多个窗口的滑动框架的一致协调以及衰减因子的应用。我们的方法与其他最近类似的处理方法和社区发现方法进行了比较,并验证了对两个相关的数据集与地面真相数据,使用内容,时间,和网络分析,以及与设计,训练和应用的三个一类分类器建立使用地面真相,其效用进一步证明在两个案例研究有争议的在线讨论。

英文摘要:

Political misinformation, astroturfing and organised trolling are online malicious behaviours with significant real-world effects. Many previous approaches examining these phenomena have focused on broad campaigns rather than the small groups responsible for instigating or sustaining them. To reveal latent (i.e., hidden) networks of cooperating accounts, we propose a novel temporal window approach that relies on account interactions and metadata alone. It detects groups of accounts engaging in various behaviours that, in concert, come to execute different goal-based strategies, a number of which we describe. The approach relies upon a pipeline that extracts relevant elements from social media posts, infers connections between accounts based on criteria matching the coordination strategies to build an undirected weighted network of accounts, which is then mined for communities exhibiting high levels of evidence of coordination using a novel community extraction method. We address the temporal aspect of the data by using a windowing mechanism, which may be suitable for near real-time application. We further highlight consistent coordination with a sliding frame across multiple windows and application of a decay factor. Our approach is compared with other recent similar processing approaches and community detection methods and is validated against two relevant datasets with ground truth data, using content, temporal, and network analyses, as well as with the design, training and application of three one-class classifiers built using the ground truth; its utility is furthermore demonstrated in two case studies of contentious online discussions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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