The Impact of Demographics (Age and Gender) and Other User-Characteristics on Evaluating Recommender Systems

  • Joeran Beel
  • Stefan Langer
  • Andreas Nürnberger
  • Marcel Genzmehr
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8092)

Abstract

In this paper we show the importance of considering demographics and other user characteristics when evaluating (research paper) recommender systems. We analyzed 37,572 recommendations delivered to 1,028 users and found that elderly users clicked more often on recommendations than younger ones. For instance, 20-24 years old users achieved click-through rates (CTR) of 2.73% on average while CTR for users between 50 and 54 years was 9.26%. Gender only had a marginal impact (CTR males 6.88%; females 6.67%) but other user characteristics such as whether a user was registered (CTR: 6.95%) or not (4.97%) had a strong impact. Due to the results we argue that future research articles on recommender systems should report detailed data on their users to make results better comparable.

Keywords

recommender systems demographics evaluation research paper 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Joeran Beel
    • 1
  • Stefan Langer
    • 1
  • Andreas Nürnberger
    • 2
  • Marcel Genzmehr
    • 1
  1. 1.DocearGermany
  2. 2.Dpt. of Computer Science, DKE GroupOtto-von-Guericke UniversityMagdeburgGermany

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