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A group recommendation system for online communities

Author

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  • Kim, Jae Kyeong
  • Kim, Hyea Kyeong
  • Oh, Hee Young
  • Ryu, Young U.

Abstract

Online communities are virtual spaces over the Internet in which a group of people with similar interests or purposes interact with others and share information. To support group activities in online communities, a group recommendation procedure is needed. Though there have been attempts to establish group recommendation, they focus on off-line environments. Further, aggregating individuals’ preferences into a group preference or merging individual recommendations into group recommendations—an essential component of group recommendation—often results in dissatisfaction of a small number of group members while satisfying the majority. To support group activities in online communities, this paper proposes an improved group recommendation procedure that improves not only the group recommendation effectiveness but also the satisfaction of individual group members. It consists of two phases. The first phase was to generate a recommendation set for a group using the typical collaborative filtering method that most existing group recommendation systems utilize. The second phase was to remove irrelevant items from the recommendation set in order to improve satisfaction of individual members’ preferences. We built a prototype system and performed experiments. Our experiment results showed that the proposed system has consistently higher precision and individual members are more satisfied.

Suggested Citation

  • Kim, Jae Kyeong & Kim, Hyea Kyeong & Oh, Hee Young & Ryu, Young U., 2010. "A group recommendation system for online communities," International Journal of Information Management, Elsevier, vol. 30(3), pages 212-219.
    • Handle: RePEc:eee:ininma:v:30:y:2010:i:3:p:212-219
    DOI: 10.1016/j.ijinfomgt.2009.09.006
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    References listed on IDEAS

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