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Erschienen in:
2012 | OriginalPaper | Buchkapitel
Polarity Preference of Verbs: What Could Verbs Reveal about the Polarity of Their Objects?
verfasst von : Manfred Klenner, Stefanos Petrakis
Erschienen in: Natural Language Processing and Information Systems
Verlag: Springer Berlin Heidelberg
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The current endeavour focuses on the notion of positive versus negative polarity preference of verbs for their direct objects. This preference has to be distinguished from a verb’s own prior polarity - for the same verb, these two properties might even be inverse. Polarity preferences of verbs are extracted on the basis of a large and dependency-parsed corpus by means of statistical measures. We observed verbs with a relatively clear positive or negative polarity preference, as well as cases of verbs where positive and negative polarity preference is balanced (we call these bipolar-preference verbs). Given clear-cut polarity preferences of a verb, nouns, whose polarity is yet unknown, can now be classified. We reached a lower bound of 81% precision in our experiments, whereas the upper bound goes up to 92%.