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|DOI (Digital Object Identifier) Link:||http://dx.doi.org/10.1145/2184436.2184437|
|Google Scholar:||Look up in Google Scholar|
This paper presents two novel approaches for incorporating sentiment prior knowledge into the topic model for weakly-supervised sentiment analysis where sentiment labels are considered as topics. One is by modifying the Dirichlet prior for topic-word distribution (LDA-DP), the other is by augmenting the model objective function through adding terms that express preferences on expectations of sentiment labels of the lexicon words using generalized expectation criteria (LDA-GE). We conducted extensive experiments on English movie review data and multi-domain sentiment dataset as well as Chinese product reviews about mobile phones, digital cameras, MP3 players, and monitors. The results show that while both LDA-DP and LDA-GE perform com- parably to existing weakly-supervised sentiment classification algorithms, they are much simpler and computationally efficient, rendering them more suitable for online and real-time sentiment classification on the Web. We observed that LDA-GE is more effective than LDA-DP, suggesting that it should be preferred when considering employing the topic model for sentiment analysis. Moreover, both models are able to extract highly domain-salient polarity words from text.
|Item Type:||Journal Article|
|Copyright Holders:||2012 ACM|
|Keywords:||sentiment analysis; latent Dirichlet allocation; generalized expectation; weakly-supervised sentiment classification|
|Academic Unit/Department:||Knowledge Media Institute|
|Interdisciplinary Research Centre:||Centre for Research in Computing (CRC)|
|Depositing User:||Yulan He|
|Date Deposited:||25 Jan 2012 15:01|
|Last Modified:||07 Feb 2013 15:43|
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