Proceedings of the Third International AAAI Conference on Web and Social Media

Delta TFIDF: An Improved Feature Space for Sentiment Analysis

Justin Martineau and Tim Finin

May 17, 2009

Mining opinions and sentiment from social networking sites is a popular application for social media systems. Common approaches use a machine learning system with a bag of words feature set. We present Delta TFIDF, an intuitive general purpose technique to efficiently weight word scores before classification. Delta TFIDF is easy to compute, implement, and understand. We use Support Vector Machines to show that Delta TFIDF significantly improves accuracy for sentiment analysis problems using three well known data sets.

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Tags: ai, information retrieval, language, learning, natural language processing, natural language processing, sentiment, svm

Type: InProceedings

Publisher: AAAI Press

Organization: AAAI

Address: San Jose, CA

Volume: 3

Number: 1

Note: DOI: 10.1609/icwsm.v3i1.13979

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Google Scholar Citations: 5 citations