Simple and effective approach to score standardisation

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

Webber, Moffat and Zobel proposed score standardization for information retrieval evaluation with multiple test collections. Given a topic-by-run raw score matrix in terms of some evaluation measure, each score can be standardised using the topic's sample mean and sample standard deviation across a set of past runs so as to quantify how different a system is from the "average" system in standard deviation units. Using standardised scores, researchers can compare systems across different test collections without worrying about topic hardness or normalisation. While Webber et al. mapped the standardised scores to the [0,1] range using a standard normal cumulative density function, the present study demonstrates that linear transformation of the standardised scores, a method widely used in educational research, can be a simple and effective alternative. We use three TREC robust track data sets with graded relevance assessments and official runs to compare these methods by means of leave-one-out tests, discriminative power, swap rate tests, and topic set size design. In particular, we demonstrate that our method is superior to the method of Webber et al. in terms of swap rates and topic set size design: put simply, our method ensures pairwise system comparisons that are more consistent across different data sets, and is arguably more convenient for designing a new test collection from a statistical viewpoint.

Original languageEnglish
Title of host publicationICTIR 2016 - Proceedings of the 2016 ACM International Conference on the Theory of Information Retrieval
PublisherAssociation for Computing Machinery, Inc
Pages95-104
Number of pages10
ISBN (Electronic)9781450344975
DOIs
Publication statusPublished - 2016 Sep 12
Event2016 ACM International Conference on the Theory of Information Retrieval, ICTIR 2016 - Newark, United States
Duration: 2016 Sep 122016 Sep 16

Publication series

NameICTIR 2016 - Proceedings of the 2016 ACM International Conference on the Theory of Information Retrieval

Other

Other2016 ACM International Conference on the Theory of Information Retrieval, ICTIR 2016
CountryUnited States
CityNewark
Period16/9/1216/9/16

Keywords

  • Evaluation
  • Measures
  • Standardization
  • Statistical power
  • Statistical significance
  • Test collections
  • Topics
  • Variances

ASJC Scopus subject areas

  • Information Systems
  • Computer Science (miscellaneous)

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  • Cite this

    Sakai, T. (2016). Simple and effective approach to score standardisation. In ICTIR 2016 - Proceedings of the 2016 ACM International Conference on the Theory of Information Retrieval (pp. 95-104). (ICTIR 2016 - Proceedings of the 2016 ACM International Conference on the Theory of Information Retrieval). Association for Computing Machinery, Inc. https://doi.org/10.1145/2970398.2970399