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A New Cross-Validation Technique to Evaluate Quality of Recommender Systems

  • Dmitry I. Ignatov
  • Jonas Poelmans
  • Guido Dedene
  • Stijn Viaene
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7143)

Abstract

The topic of recommender systems is rapidly gaining interest in the user-behaviour modeling research domain. Over the years, various recommender algorithms based on different mathematical models have been introduced in the literature. Researchers interested in proposing a new recommender model or modifying an existing algorithm should take into account a variety of key performance indicators, such as execution time, recall and precision. Till date and to the best of our knowledge, no general cross-validation scheme to evaluate the performance of recommender algorithms has been developed. To fill this gap we propose an extension of conventional cross-validation. Besides splitting the initial data into training and test subsets, we also split the attribute description of the dataset into a hidden and visible part. We then discuss how such a splitting scheme can be applied in practice. Empirical validation is performed on traditional user-based and item-based recommender algorithms which were applied to the MovieLens dataset.

Keywords

recommender systems quality of recommendations user-behavior modeling applied combinatorics 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Dmitry I. Ignatov
    • 1
  • Jonas Poelmans
    • 2
  • Guido Dedene
    • 2
    • 4
  • Stijn Viaene
    • 2
    • 3
  1. 1.National Research University Higher School of EconomicsRussia
  2. 2.Katholieke Universiteit LeuvenBelgium
  3. 3.Vlerick Leuven Management SchoolBelgium
  4. 4.Amsterdam Business SchoolNetherlands

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