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Emotion Mining from Text Open Access


Other title
emotion detection
text mining
sentiment analysis
Type of item
Degree grantor
University of Alberta
Author or creator
Gholipour Shahraki, Ameneh
Supervisor and department
Zaiane, Osmar (Computing Science)
Examining committee member and department
Stroulia, Eleni (Computing Science)
Elmallah, Ehab (Computing Science)
Department of Computing Science

Date accepted
Graduation date
Master of Science
Degree level
Emotion mining is the science of detecting, analyzing, and evaluating humans’ feelings towards different events, issues, services, or any other interest. One of its specific directions is text emotion mining, that refers to analyzing people’s emotions based on observations of their writings. Text emotion mining is an interdisciplinary topic of interest and has many applications including helping customer care services, recommending music or movies to computer users, helping in selecting e-learning materials, filtering results of searches by emotion, and diagnosing depression or suicidal tendency. In this work, we study the problem of text emotion classification. First, we collect and cleanse a corpus of Twitter messages that convey at least one of the emotions: anger, fear, joy, love, sadness, surprise, disgust, guilt, and thankfulness. Then, we propose several lexical and learning based methods to classify the emotion of test tweets and study the effect of different feature sets, dimension reduction techniques, different learning algorithms and configurations, and also try to address the problem of sparsity of the input data. Our experimental results show that a set of Naive Bayes classifiers, each corresponding to one emotion, using unigrams as features, is the best-performing method for the task. Moreover, we address the problem of multi-label emotion classification of texts, that is concerned with tweets that represent more than one emotion. In this case, again the Naive Bayes method outperforms the others. In order to compare the efficiency of our algorithms, we test them also on a couple of other datasets, one of which is collected from Twitter, and the other contains a set of formally written texts. Our Naive Bayes approach achieves higher accuracy, compared with state-of-the-art methods working on these corpora.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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