Directional distributional similarity for lexical expansion

L Kotlerman, I. Dagan, I Szpektor, M. Zhitomirsky Geffet

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Distributional word similarity is most commonly perceived as a symmetric relation. Yet, one of its major applications is lexical expansion, which is generally asymmetric. This paper investigates the nature of directional (asymmetric) similarity measures, which aim to quantify distributional feature inclusion. We identify desired properties of such measures, specify a particular one based on averaged precision, and demonstrate the empirical benefit of directional measures for expansion.
Original languageAmerican English
Title of host publicationThe ACL-IJCNLP 2009 Conference
StatePublished - 2009

Bibliographical note

Place of conference:Singapore


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