The present study sought to explore the distinct discourse norms and evidentiary practices in discussions of COVID-19 in four subcommunities on Reddit. Qualitative analysis found that communities differed in the degree to which they reinforce and augment Reddit's platform-wide norms for dialog and evidence use. One of the three communities (r/AskTrumpSupporters) differed from the rest by establishing discourse norms for turn-taking between politically opposed users and structuring dialog around authentic questions aimed at understanding alternative points of view. Quantitative analyses revealed that this community significantly differed from the other communities in the proportion of dialogic exchanges and in the use of evidentiary practices (sourcing, source evaluation, and interpretation of evidence). Excerpts of dialog from this community are used to illustrate findings. We conclude with implications for educators interested in preparing youth to critically engage with scientific information they encounter in public discourse.

中文翻译：

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事实不言自明：Reddit 上关于 COVID-19 讨论中的社区规范、对话和证据实践。

本研究试图探索 Reddit 四个子社区中关于 COVID-19 的讨论中的独特话语规范和证据实践。定性分析发现，社区在强化和增强 Reddit 平台范围内对话和证据使用规范的程度上存在差异。三个社区之一 (r/AskTrumpSupporters) 与其他社区不同，它为政治上对立的用户之间的轮流建立话语规范，并围绕旨在理解不同观点的真实问题构建对话。定量分析表明，该社区在对话交流的比例和证据实践（来源、来源评估和证据解释）的使用方面与其他社区存在显着差异。该社区的对话摘录用于说明研究结果。最后，我们对那些有兴趣让年轻人批判性地接触他们在公共话语中遇到的科学信息的教育工作者提出了一些建议。