Non-Compositionality in Sentiment: New Data and Analyses
Verna Dankers Christopher G. Lucas
When natural language phrases are combined, their meaning is often more than
the sum of their parts. In the context of NLP tasks such as sentiment analysis,
where the meaning of a phrase is its sentiment, that still applies. Many NLP
studies on sentiment analysis, however, focus on the fact that sentiment
computations are largely compositional. We, instead, set out to obtain
non-compositionality ratings for phrases with respect to their sentiment. Our
contributions are as follows: a) a methodology for obtaining those
non-compositionality ratings, b) a resource of ratings for 259 phrases --
NonCompSST -- along with an analysis of that resource, and c) an evaluation of
computational models for sentiment analysis using this new resource.