Recognizing Strong and Weak Opinion Clauses

This document summarizes research on recognizing the intensity of subjective opinion clauses, ranging from strongly negative to strongly positive. It discusses how opinion intensity can vary beyond being simply positive or negative. The researchers annotated over 10,000 sentences with subjective opinion clauses and their intensities. Several machine learning classifiers were trained on these annotations to predict the intensity of new clauses, with support vector machines performing best. Key factors included using bag-of-words features along with intensity or type groups of subjective clues.