Prior Information and the Determination of Event Spaces in Probabilistic Information Retrieval Models

  • Authors:
  • Corrado Boscarino;Arjen P. Vries

  • Affiliations:
  • Centrum Wiskunde & Informatica (CWI), Science Park 123, Amsterdam, The Netherlands 1098;Centrum Wiskunde & Informatica (CWI), Science Park 123, Amsterdam, The Netherlands 1098

  • 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

A mismatch between different event spaces has been used to argue against rank equivalence of classic probabilistic models of information retrieval and language models. We question the effectiveness of this strategy and we argue that a convincing solution should be sought in a correct procedure to design adequate priors for probabilistic reasoning. Acknowledging our solution of the event space issue invites to rethink the relation between probabilistic models, statistics and logic in the context of IR.