Better Document-level Sentiment Analysis from RST Discourse Parsing

Parminder Bhatia, Yangfeng Ji, Jacob Eisenstein
2015 Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing  
Discourse structure is the hidden link between surface features and document-level properties, such as sentiment polarity. We show that the discourse analyses produced by Rhetorical Structure Theory (RST) parsers can improve document-level sentiment analysis, via composition of local information up the discourse tree. First, we show that reweighting discourse units according to their position in a dependency representation of the rhetorical structure can yield substantial improvements on
more » ... -based sentiment analysis. Next, we present a recursive neural network over the RST structure, which offers significant improvements over classificationbased methods.
doi:10.18653/v1/d15-1263 dblp:conf/emnlp/BhatiaJE15 fatcat:ahst7n7cybfyrjknl6myfgrcgi