Intuitively, adjectives like ``beautiful'', ``wonderful'', and ``great'' hold valuable sentiment information, so we trained our classifiers after filtering out only the adjectives within reviews. On average, adjective tests performed about 6% worse than their unfiltered negation-tagged counterparts, with no notable difference between the 3 classifiers. These results suggest that the limited information conveyed in adjectives is not representative of the full review itself.

Pranjal Vachaspati 2012-02-05