PACLIC 29 Is Wikipedia Really Neutral? A Sentiment Perspective Study of War-related Wikipedia Articles since 1945 Yiwei Zhou, Alexandra I. Cristea and Zachary Roberts Department of Computer Science University of Warwick Coventry, United Kingdom fYiwei.Zhou, A.I.Cristea,
[email protected] Abstract include books, journal articles, newspapers, web- pages, sound recordings2, etc. Although a “Neutral Wikipedia is supposed to be supporting the 3 “Neutral Point of View”. Instead of accept- point of view” (NPOV) is Wikipedia’s core content ing this statement as a fact, the current paper policy, we believe sentiment expression is inevitable analyses its veracity by specifically analysing in this user-generated content. Already in (Green- a typically controversial (negative) topic, such stein and Zhu, 2012), researchers have raised doubt as war, and answering questions such as “Are about Wikipedia’s neutrality, as they pointed out there sentiment differences in how Wikipedia that “Wikipedia achieves something akin to a NPOV articles in different languages describe the across articles, but not necessarily within them”. same war?”. This paper tackles this chal- Moreover, people of different language backgrounds lenge by proposing an automatic methodology based on article level and concept level senti- share different cultures and sources of information. ment analysis on multilingual Wikipedia arti- These differences have reflected on the style of con- cles. The results obtained so far show that rea- tributions (Pfeil et al., 2006) and the type of informa- sons such as people’s feelings of involvement tion covered (Callahan and Herring, 2011). Further- and empathy can lead to sentiment expression more, Wikipedia webpages actually allow to con- differences across multilingual Wikipedia on tain opinions, as long as they come from reliable au- war-related topics; the more people contribute thors4.