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arXiv 2102.08537cs.CY
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10万多个在线社区新闻分享中的政治偏见和真实性

Political Bias and Factualness in News Sharing across more than 100,000 Online Communities

Galen Weld, Maria Glenski, Tim Althoff

摘要:

随着公民话语越来越多地发生在网上,网上社区中分享的错误信息和新闻两极分化已经成为我们社会中与现实世界危害更加相关的问题。研究大规模的在线新闻共享是具有挑战性的,因为成千上万的社区中数百万用户共享了大量的内容。因此,现有的研究主要集中在特定的社区或特定的干预措施,如禁令。然而,更广泛地了解错误信息和两极分化的流行和传播,在数千个在线社区中,对于制定治理战略,干预措施和社区设计至关重要。在这里,我们对Reddit上的新闻分享进行了迄今为止最大的研究,分析了4年来超过5.5亿个链接。我们使用来自Media Bias/Fact Check的无党派新闻来源评级,以其政治偏见和真实性来注释新闻来源的链接。我们发现,与左倾社区相比,右倾社区在新闻来源的政治偏见方面有105%的差异,平均而言,与相对更有偏见的来源有更多的联系。我们观察到,reddit用户的投票和再分享行为通常会降低极端偏见和低事实内容的可见性,与中立或更真实的内容相比,这些内容的好评率和交叉发布的曝光率分别减少了20%和30%。这表明Reddit比Twitter更能适应低事实内容。我们发现,极端偏见和低事实内容非常集中,99%的此类内容仅在0.5%的社区中共享,这证明了最近社区范围内的禁令和禁止策略。

英文摘要:

As civil discourse increasingly takes place online, misinformation and the polarization of news shared in online communities have become ever more relevant concerns with real world harms across our society. Studying online news sharing at scale is challenging due to the massive volume of content which is shared by millions of users across thousands of communities. Therefore, existing research has largely focused on specific communities or specific interventions, such as bans. However, understanding the prevalence and spread of misinformation and polarization more broadly, across thousands of online communities, is critical for the development of governance strategies, interventions, and community design. Here, we conduct the largest study of news sharing on reddit to date, analyzing more than 550 million links spanning 4 years. We use non-partisan news source ratings from Media Bias/Fact Check to annotate links to news sources with their political bias and factualness. We find that, compared to left-leaning communities, right-leaning communities have 105% more variance in the political bias of their news sources, and more links to relatively-more biased sources, on average. We observe that reddit users' voting and re-sharing behaviors generally decrease the visibility of extremely biased and low factual content, which receives 20% fewer upvotes and 30% fewer exposures from crossposts than more neutral or more factual content. This suggests that reddit is more resilient to low factual content than Twitter. We show that extremely biased and low factual content is very concentrated, with 99% of such content being shared in only 0.5% of communities, giving credence to the recent strategy of community-wide bans and quarantines.

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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