Paper: An Iterative Approach To Estimating Frequencies Over A Semantic Hierarchy

ACL ID W99-0631
Title An Iterative Approach To Estimating Frequencies Over A Semantic Hierarchy
Venue 2000 Joint SIGDAT Conference on Empirical Methods in Natural Language Processing and Very Large Corpora
Session Main Conference
Year 1999
Authors

This paper is concerned with using a se- mantic hierarchy to estimate the frequency with which a word sense appears as a given argument of a verb, assuming the data is not sense disambiguated. The standard ap- proach is to split the count for any noun ap- pearing in the data equally among the al- ternative senses of the noun. This can lead to inaccurate estimates. We describe a re- estimation process which uses the accumu- lated counts of hypernyms of the alternative senses in order to redistribute the count. In order to choose a hypernym for each alter- native sense, we employ a novel technique which uses a X 2 test to measure the homo- geneity of sets of concepts in the hierarchy.