User credit-based collaborative filtering

  • Authors:
  • Buhwan Jeong;Jaewook Lee;Hyunbo Cho

  • Affiliations:
  • Data Mining Team, Daum Communications Corp., 1730-8 Odeung, Jeju 690-150, South Korea;Department of Industrial and Management Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja, Pohang Kyungbuk 790-784, South Korea;Department of Industrial and Management Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja, Pohang Kyungbuk 790-784, South Korea

  • Venue:
  • Expert Systems with Applications: An International Journal
  • Year:
  • 2009

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Abstract

Memory-based collaborative filtering is the state-of-the-art method in recommender systems and has proven to be successful in various applications. In this paper we develop novel memory-based methods that incorporate the level of a user credit instead of using similarity between users. The user credit is the degree of one's rating reliability that measures how adherently the user rates items as others do. Preliminary simulation results show that the proposed methods outperform the conventional memory-based ones. The methods are effective in a cold-starting problem.