tailieunhanh - Báo cáo khoa học: "Choosing Sense Distinctions for WSD: Psycholinguistic Evidence"

Supervised word sense disambiguation requires training corpora that have been tagged with word senses, which begs the question of which word senses to tag with. The default choice has been WordNet, with its broad coverage and easy accessibility. However, concerns have been raised about the appropriateness of its fine-grained word senses for WSD. WSD systems have been far more successful in distinguishing coarsegrained senses than fine-grained ones (Navigli, 2006), but does that approach neglect necessary meaning differences? . | Choosing Sense Distinctions for WSD Psycholinguistic Evidence Susan Windisch Brown Department of Linguistics Institute of Cognitive Science University of Colorado Hellems 295 UCB Boulder CO 80309 Abstract Supervised word sense disambiguation requires training corpora that have been tagged with word senses which begs the question of which word senses to tag with. The default choice has been WordNet with its broad coverage and easy accessibility. However concerns have been raised about the appropriateness of its fine-grained word senses for WSD. WSD systems have been far more successful in distinguishing coarsegrained senses than fine-grained ones Navig-li 2006 but does that approach neglect necessary meaning differences Recent psycholinguistic evidence seems to indicate that closely related word senses may be represented in the mental lexicon much like a single sense whereas distantly related senses may be represented more like discrete entities. These results suggest that for the purposes of WSD closely related word senses can be clustered together into a more general sense with little meaning loss. The current paper will describe this psycholinguistic research and its implications for automatic word sense disambiguation. 1 Introduction The problem of creating a successful word sense disambiguation system begins or should begin well before methods or algorithms are considered. The first question should be Which senses do we want to be able to distinguish Dictionaries en- I gratefully acknowledge the support of the National Science Foundation Grant NSF-0415923 Word Sense Disambiguation. courage us to consider words as having a discrete set of senses yet any comparison between dictionaries quickly reveals how differently a word s meaning can be divided into separate senses. Rather than having a finite list of senses many words seem to have senses that shade from one into another. One could assume that dictionaries make broadly similar .