Evaluating sources of query expansion terms

Authors:
Xin Fu;Diane Kelly
Affiliations:
University of North Carolina at Chapel Hill, NC;University of North Carolina at Chapel Hill, NC
Venue:
SIGIR '06 Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval
Year:
2006

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Abstract

This study investigates the effectiveness of retrieval systems and human users in generating terms for query expansion. We compare three sources of terms: system generated terms, terms users select from top-ranked sentences, and user generated terms. Results demonstrate that overall the system generated more effective expansion terms than users, but that users' selection of terms improved precision at the top of the retrieved document list.