Class-based probability estimation using a semantic hierarchy

Clark, Stephen and Weir, David (2002) Class-based probability estimation using a semantic hierarchy. Computational Linguistics, 28 (2). pp. 187-206. ISSN 0891-2017

[img]
Preview
PDF
Download (273kB) | Preview

Abstract

This article concerns the estimation of a particular kind of probability, namely, the probability of a noun sense appearing as a particular argument of a predicate. In order to overcome the accompanying sparse-data problem, the proposal here is to define the probabilities in terms of senses from a semantic hierarchy and exploit the fact that the senses can be grouped into classes consisting of semantically similar senses. There is a particular focus on the problem of how to determine a suitable class for a given sense, or, alternatively, how to determine a suitable level of generalization in the hierarchy. A procedure is developed that uses a chi-square test to determine a suitable level of generalization. In order to test the performance of the estimation method, a pseudo-disambiguation task is used, together with two alternative estimation methods. Each method uses a different generalization procedure; the first alternative uses the minimum description length principle, and the second uses Resnik's measure of selectional preference. In addition, the performance of our method is investigated using both the standard Pearson chi-square statistic and the log-likelihood chi-square statistic.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Informatics
Subjects: Q Science > QA Mathematics > QA0075 Electronic computers. Computer science
Q Science > QA Mathematics > QA0076 Computer software
Depositing User: David Weir
Date Deposited: 21 Nov 2006
Last Modified: 07 Mar 2017 06:41
URI: http://sro.sussex.ac.uk/id/eprint/499
Google Scholar:107 Citations

View download statistics for this item

📧 Request an update