Kim, E. H. J., Jeong, Y. K., Kim, Y., Kang, K. Y., & Song, M. (2016). Topic-based content and sentiment analysis of Ebola virus on Twitter and in the news. Journal of Information Science, 42(6), 763-781.

https://doi.org/10.1177/0165551515608733

Abstract
The present study investigates topic coverage and sentiment dynamics of two different media sources, Twitter and news publications, on the hot health issue of Ebola. We conduct content and sentiment analysis by: (1) applying vocabulary control to collected datasets; (2) employing the n-gram LDA topic modeling technique; (3) adopting entity extraction and entity network; and (4) introducing the concept of topic-based sentiment scores. With the query term ‘Ebola’ or ‘Ebola virus’, we collected 16,189 news articles from 1006 different publications and 7,106,297 tweets with the Twitter stream API. The experiments indicate that topic coverage of Twitter is narrower and more blurry than that of the news media. In terms of sentiment dynamics, the life span and variance of sentiment on Twitter is shorter and smaller than in the news. In addition, we observe that news articles focus more on event-related entities such as person, organization and location, whereas Twitter covers more time-oriented entities. Based on the results, we report on the characteristics of Twitter and news media as two distinct news outlets in terms of content coverage and sentiment dynamics.

연구의의

본 연구는 사회에 영향을 미치는 이슈가 발생했을 때, 온라인상의 여론과 언론 반응의 변화양상을 시계열적인 측면에서 분석한 연구임. 전 세계적으로 큰 영향을 미쳤던 에볼라 사태에 대한 전 세계적인 여론 반응의 주제가 어떻게 변화하는지를 파악하고, 이에 따른 감성변화를 추적함.