%0期刊文章%@ 2564-1891 %I JMIR出版物%V 2% 卡塔尔世界杯8强波胆分析N 2% P e36941% T关于Reddit上COVID-19大流行的观点:美国、英国、加拿大和澳大利亚自然语言处理比较研究%A Hu,Mengke %A Conway,Mike %+犹他大学生物医学信息系，6301 S Madrid St, Salt Lake City, UT, 84121, United States, 1 2159150417, mengke.hu@utah.edu %K COVID-19 %K social media %K自然语言处理%K Reddit %D 2022 %7 27.9.2022 %9原创论文%J JMIR Infodemiology %G英文%X背景:自2020年3月11日世界卫生组织宣布新冠肺炎大流行以来，该疾病在全球范围内产生了前所未有的影响。像Reddit这样的社交媒体可以作为增强态势感知的资源，特别是在危机期间监测公众态度和行为方面。然后，可以利用所获得的见解更好地了解COVID-19危机期间的公众态度和行为，并支持传播和健康促进信息。目的:这项研究的目的是利用来自社交媒体平台Reddit的数据，比较四个主要英语国家(美国、英国、加拿大和澳大利亚)对2020-2021年COVID-19大流行的公众态度。方法:我们利用主题建模自然语言处理方法(更具体地说是潜在狄利克雷分配)。主题建模是一种流行的无监督学习技术，可用于从大量文本中自动推断主题(即语义相关的类别)。我们的数据来自6个特定国家的、与covid -19相关的reddit子版块(r/冠状病毒澳大利亚、r/冠状病毒下、r/加拿大冠状病毒、r/加拿大冠状病毒、r/英国冠状病毒和r/冠状病毒)。我们使用主题建模方法来调查和比较每个国家关注的主题。 Results: Our consolidated Reddit data set consisted of 84,229 initiating posts and 1,094,853 associated comments collected between February and November 2020 for the United States, the United Kingdom, Canada, and Australia. The volume of posting in COVID-19–related subreddits declined consistently across all four countries during the study period (February 2020 to November 2020). During lockdown events, the volume of posts peaked. The UK and Australian subreddits contained much more evidence-based policy discussion than the US or Canadian subreddits. Conclusions: This study provides evidence to support the contention that there are key differences between salient topics discussed across the four countries on the Reddit platform. Further, our approach indicates that Reddit data have the potential to provide insights not readily apparent in survey-based approaches. %M 36196144 %R 10.2196/36941 %U https://infodemiology.www.mybigtv.com/2022/2/e36941 %U https://doi.org/10.2196/36941 %U http://www.ncbi.nlm.nih.gov/pubmed/36196144