Understanding temporal dynamics of ratings in the book recommendation scenario

  • Authors:
  • Paula Cristina Vaz;Ricardo Ribeiro;David Martins de Matos

  • Affiliations:
  • INESC-ID/IST/UAL, Lisboa, Portugal;INESC-ID/ISCTE-UL, Lisboa, Portugal;INESC-ID/IST, Lisboa, Portugal

  • Venue:
  • Proceedings of the 2013 International Conference on Information Systems and Design of Communication
  • Year:
  • 2013

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Abstract

Libraries have large growing book collections. Library users have difficulty in browsing the whole collection when choosing new books to read, particularly when looking for books without a defined goal. In this case, recommendation systems come in hand and play an important role in improving library usability. Recommendations are based on ratings and the quality of recommendations depends on the quality of the ratings. In this paper, we adapted an item-based collaborative filtering algorithm by incorporating temporal information. We, then, analyze the influence of the rating age in final predictions. Our findings suggest that prediction quality improve when some conditions are met. Moreover, user tastes are more correlated with recent rated books than old ones.