JACIII Vol.24 No.6 pp. 719-727
doi: 10.20965/jaciii.2020.p0719


Matrix-Based Collaborative Filtering Employing Personal Values-Based Modeling and Model Relationship Learning

Yasufumi Takama, Hiroki Shibata, and Yuya Shiraishi

Graduate School of Systems Design, Tokyo Metropolitan University
6-6 Asahigaoka, Hino, Tokyo 191-0065, Japan

February 18, 2020
July 27, 2020
November 20, 2020
recommendation, personal values, matrix factorization, collaborative filtering, BPR

This paper proposes a matrix-based collaborative filtering (CF) employing personal values (MCFPV). Introduction of various factors such as diversity and long-tailedness in addition to accuracy is a recent trend in the study of recommender systems. We think recommending acceptable items while satisfying users’ preference is important when considering other factors than accuracy. Also, interpretability is one of important characteristics recommender systems should have. To recommend acceptable items on the basis of an interpretable mechanism, this paper proposes a matrix-based recommendation method based on personal values-based modeling. Whereas existing CF based on matrix factorization methods are known to be more accurate than neighborhood-based CF, latent factors obtained by existing methods are difficult to interpret. On the other hand, user/item models of the propose method (MCFPV) is expected to be interpretable, because it represents the effect of each attribute items have on user’s decision making. Regarding a model relationship matrix that connects user and item models, this paper proposes two approaches: manual setting and machine learning approaches. Experimental results using 5 datasets generated from actual review sites show that the proposed methods recommend much unpopular items than the state-of-the art matrix factorization-based methods while keeping precision and recall.

Cite this article as:
Y. Takama, H. Shibata, and Y. Shiraishi, “Matrix-Based Collaborative Filtering Employing Personal Values-Based Modeling and Model Relationship Learning,” J. Adv. Comput. Intell. Intell. Inform., Vol.24 No.6, pp. 719-727, 2020.
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