Accounting for Negation in Sentiment Analysis

BMWT Heerschop, P van Iterson, Alexander Hogenboom, Flavius Frasincar, U Kaymak

Research output: Contribution to conferencePosterAcademic


Automated ways of analyzing sentiment in Web data are becoming more and more urgent as virtual utterances of opinions or sentiment are becoming increasingly abundant on the Web. The role of negation in sentiment analysis has been explored only to a limited extent until now. In this paper, we investigate the impact of accounting for negation in sentiment analysis. To this end, we utilize a basic sentiment analysis framework – consisting of a wordbank creation part and a document scoring part – taking into account negation. Our experimental results show that by accounting for negation, precision relative to human ratings increases with 1.17%. On a subset of selected documents containing negated words, precision increases with 2.23%.
Original languageEnglish
Number of pages2
Publication statusPublished - 4 Feb 2011
EventEleventh Dutch-Belgian Information Retrieval Workshop (DIR 2011) - Amsterdam, The Netherlands
Duration: 4 Feb 20114 Feb 2011


ConferenceEleventh Dutch-Belgian Information Retrieval Workshop (DIR 2011)
CityAmsterdam, The Netherlands


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