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Query expansion on a corporate intranet: Using LSI to increase precision in explorative search

Conference paper
Authors Dick Stenmark
Published in Proceedings of HICSS-38, Big Island, Hawaii, January 3-6
Publication year 2005
Published at Department of Applied Information Technology (GU)
Language en
Links https://gup.ub.gu.se/file/98149
Keywords intranet, search engine, query expansion
Subject categories Informatics

Abstract

Previous research has taught us that the typical nonprofessional information seeker on the World Wide Web submits very short queries resulting in low-precision results. We show that this behaviour is repeated also by intranet users and therefore apply query expansion (QE) techniques to improve their search results. Arguing that casual searchers are likely to be unwilling to engage in the dialogue required for interactive QE, we provide an automatic QE system based on Latent Semantic Indexing (LSI). Having received mixed results, our analysis suggests that automatic QE based on a collection dependent knowledge structure may work for explorative, i.e. broader, queries whilst targeted and more focused queries suffer from query drift.

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