Ranking List Dispersion as a Query Performance Predictor

  • Authors:
  • Joaquín Pérez-Iglesias;Lourdes Araujo

  • Affiliations:
  • Universidad Nacional de Educación a Distancia, Madrid, Spain 28040;Universidad Nacional de Educación a Distancia, Madrid, Spain 28040

  • Venue:
  • ICTIR '09 Proceedings of the 2nd International Conference on Theory of Information Retrieval: Advances in Information Retrieval Theory
  • 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 hypothesis 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 use of measures based on standard deviation of ranking list scores, as a prediction value, shows a significant correlation degree in terms of average precision.