Generalization of recommender systems: Collaborative filtering extended to groups of users and restricted to groups of items

被引:32
作者
Bobadilla, Jesus [1 ]
Ortega, Fernando [1 ]
Hernando, Antonio [1 ]
Bernal, Jesus [1 ]
机构
[1] Univ Politecn Madrid, FilmAffin Com Res Team, Madrid 28031, Spain
关键词
Recommender systems; Collaborative filtering; Generalization; Users items; OF-THE-ART;
D O I
10.1016/j.eswa.2011.07.005
中图分类号
TP18 [人工智能理论];
学科分类号
081104 ; 0812 ; 0835 ; 1405 ;
摘要
In this paper we present a collaborative filtering method which opens up the possibilities of traditional collaborative filtering in two aspects: (1) it enables joint recommendations to groups of users and (2) it enables the recommendations to be restricted to items similar to a set of reference items. By way of example, a group of four friends could request joint recommendations of films similar to "Avatar" or "Titanic". In the paper, using experiments, we show that the traditional approach of collaborative filtering does not satisfactorily resolve the new possibilities contemplated: we also provide a detailed formulation of the method proposed and an extensive set of experiments and comparative results which show the superiority of designed collaborative filtering compared to traditional collaborative filtering in: (a) number of recommendations obtained, (b) quality of the predictions, (c) quality of the recommendations. The experiments have been carried out on the databases Movielens and Netflix. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:172 / 186
页数:15
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