Probability ranking principle via optimal expected rank

  • Authors:
  • H. C. Wu;Robert W. P. Luk;K. F. Wong

  • Affiliations:
  • The Hong Kong Polytechnic University, Hung Hom, Hong Kong;The Hong Kong Polytechnic University, Hung Hom, Hong Kong;The Chinese University of Hong Kong, Shatin, Hong Kong

  • Venue:
  • SIGIR '07 Proceedings of the 30th annual international ACM SIGIR conference on Research and development in information retrieval
  • Year:
  • 2007

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Abstract

This paper presents a new perspective of the probability ranking principle (PRP) by defining retrieval effectiveness in terms of our novel expected rank measure of a set of documents for a particular query. This perspective is based on preserving decision preferences, and it imposes weaker conditions on PRP than the utility-theoretic perspective of PRP.