Modeling online reviews with multi-grain topic models

Ivan Titov, Ryan T. McDonald

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper we present a novel framework for extracting the ratable aspects of objects from online user reviews. Extracting such aspects is an important challenge in automatically mining product opinions from the web and in generating opinion-based summaries of user reviews [18, 19, 7, 12, 27, 36, 21]. Our models are based on extensions to standard topic modeling methods such as LDA and PLSA to induce multi-grain topics. We argue that multi-grain models are more appropriate for our task since standard models tend to produce topics that correspond to global properties of objects (e.g., the brand of a product type) rather than the aspects of an object that tend to be rated by a user. The models we present not only extract ratable aspects, but also cluster them into coherent topics, e.g., 'waitress' and 'bartender' are part of the same topic 'staff' for restaurants. This differentiates it from much of the previous work which extracts aspects through term frequency analysis with minimal clustering. We evaluate the multi-grain models both qualitatively and quantitatively to show that they improve significantly upon standard topic models.
Original languageEnglish
Title of host publicationProceedings of the 17th International Conference on World Wide Web, WWW 2008, Beijing, China, April 21-25, 2008
PublisherACM
Pages111-120
Number of pages10
ISBN (Print)978-1-60558-085-2
DOIs
Publication statusPublished - Apr 2008

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