The Effectiveness of Personalized Movie Explanations: An Experiment Using Commercial Meta-data

  • Authors:
  • Nava Tintarev;Judith Masthoff

  • Affiliations:
  • University of Aberdeen, Aberdeen, U.K.;University of Aberdeen, Aberdeen, U.K.

  • Venue:
  • AH '08 Proceedings of the 5th international conference on Adaptive Hypermedia and Adaptive Web-Based Systems
  • Year:
  • 2008

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Abstract

This paper studies the properties of a helpful and trustworthy explanation in a movie recommender system. It discusses the results of an experiment based on a natural language explanation prototype. The explanations were varied according to three factors: degree of personalization, polarity and expression of unknown movie features. Personalized explanations were not found to be significantly more Effective than non-personalized, or baseline explanations. Rather, explanations in all three conditions performed surprisingly well. We also found that participants evaluated the explanations themselves most highly in the personalized, feature-based condition.