Journal
INFORMATION PROCESSING & MANAGEMENT
Volume 51, Issue 4, Pages 547-556Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ipm.2014.10.004
Keywords
Subjectivity analysis; Sentiment analysis; Multilingual resources; Social media mining; Chat analysis
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Nowadays opinion mining systems play a strategic role in different areas such as Marketing, Decision Support Systems or Policy Support Since the arrival of the Web 2.0, more and more textual documents containing information that express opinions or comments in different languages are available. Given the proven importance of such documents, the use of effective multilingual opinion mining systems has become of high importance to different fields. This paper presents the experiments carried out with the objective to develop a multilingual sentiment analysis system. We present initial evaluations of methods and resources performed in two international evaluation campaigns for English and for Spanish. After our participation in both competitions, additional experiments were carried out with the aim of improving the performance of both Spanish and English systems by using multilingual machine-translated data. Based on our evaluations, we show that the use of hybrid features and multilingual, machine-translated data (even from other languages) can help to better distinguish relevant features for sentiment classification and thus increase the precision of sentiment analysis systems. (C) 2014 Elsevier Ltd. All rights reserved.
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