Query performance prediction based on ranking list dispersion

  • Authors:
  • Joaquín Pérez-Iglesias

  • Affiliations:
  • Universidad Nacional de Educaci ón a Distancia, Madrid, Spain

  • Venue:
  • FDIA'09 Proceedings of the Third BCS-IRSG conference on Future Directions in Information Access
  • Year:
  • 2009

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Abstract

In this paper we introduce a novel approach for query performance prediction based on ranking list scores dispersion. Starting from the premise that different score distributions appear for good and poor performance queries, we introduce a set of measures that capture these differences between both types of distributions. The proposed measures will employ the ranking list, output of a search system, as an information source to predict query performance in terms of MAP. The obtained results reveal a significant correlation degree with MAP and are very similar to those achievedwithmore complexmethods. Finally some generic open questions that could guide further research on query prediction methods are introduced.