An Approach for Computing Sentiment Polarity Analysis of Complex Why-type Questions on Product Review Sites

Opinion questions expect answers from opinionated data available on social web. Opinion why-questions require answers to include reasons, elaborations, explanations for the users’ sentiments expressed in the questions. Sentiment analysis has been recently used in answering why type opinion questions. In this paper, we propose an approach to determine the sentiment polarity of complex why type opinion questions that could be expressed in multiple sentences or could have mixed opinions expressed in them. We apply Rhetorical structure theory to determine discourse structure of why type questions. We use such structure to determine sentiment polarity of why type questions and conduct experiments which obtain better results as compared to baseline average scoring methods.