• Plos One · Jan 2020

    Observational Study

    Public discourse and sentiment during the COVID 19 pandemic: Using Latent Dirichlet Allocation for topic modeling on Twitter.

    • Jia Xue, Junxiang Chen, Chen Chen, Chengda Zheng, Sijia Li, and Tingshao Zhu.
    • Factor-Inwentash Faculty of Social Work, University of Toronto, Toronto, Canada.
    • Plos One. 2020 Jan 1; 15 (9): e0239441.

    AbstractThe study aims to understand Twitter users' discourse and psychological reactions to COVID-19. We use machine learning techniques to analyze about 1.9 million Tweets (written in English) related to coronavirus collected from January 23 to March 7, 2020. A total of salient 11 topics are identified and then categorized into ten themes, including "updates about confirmed cases," "COVID-19 related death," "cases outside China (worldwide)," "COVID-19 outbreak in South Korea," "early signs of the outbreak in New York," "Diamond Princess cruise," "economic impact," "Preventive measures," "authorities," and "supply chain." Results do not reveal treatments and symptoms related messages as prevalent topics on Twitter. Sentiment analysis shows that fear for the unknown nature of the coronavirus is dominant in all topics. Implications and limitations of the study are also discussed.

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