Language models, probability of relevance and relevance likelihood

  • Authors:
  • Richard Bache;Mark Baillie;Fabio Crestani

  • Affiliations:
  • University of Strathclyde, Glasgow, Scotland, United Kingdom;University of Strathclyde, Glasgow, Scotland, United Kingdom;University of Strathclyde, Glasgow, Scotland, United Kingdom

  • Venue:
  • Proceedings of the sixteenth ACM conference on Conference on information and knowledge management
  • Year:
  • 2007

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Abstract

This paper proposes a measure of relevance likelihood derived specifically for language models. Such a measure may be used to guide a user on how far to browse through the list of retrieved items or for pseudo-relevance feedback. To derive this measure, it is necessary to make the assumption that a user is seeking an ideal (usually non-existent) document and the actual relevant documents in the collection will contain fragments of this ideal document. Thus, in deriving this measure we propose a novel way of capturing relevance in Language Modelling.