Paper Info
Title
Learning to utilize auxiliary reviews for recommendation
Abstract
Review-based recommender systems represent users and items with reviews associated with them. As such, the recommender systems are highly dependent on the number of reviews, which is usually few in number. Thus, they produce inaccurate recommendations to users who rarely wrote reviews. An approach to generate better recommendations for the cold-start users is to augment the scarce reviews using other reviews, which are called auxiliary reviews. In this work, we address two research questions when leveraging auxiliary reviews: 1) How to find important auxiliary reviews? 2) How to combine the auxiliary reviews with their original reviews?, and propose a method that learns to utilize auxiliary reviews (LUAR) to tackle these questions. LUAR learns to automatically focus on important auxiliary reviews from data via neural attention mechanism. For the review combination issue, a self-attentive module in LUAR combines auxiliary reviews and original reviews considering their level of contribution. The module dynamically computes the level of contribution of each review based on its relative importance compared to others. Experimental results show that LUAR outperforms the state-of-the-art review-based recommender systems on 7 real-world datasets. Qualitative analyses also show that LUAR can accurately focus on important auxiliary reviews.
Year
DOI
Venue
2021
10.1016/j.ins.2020.09.025
Information Sciences
Keywords
DocType
Volume
Recommender system,Review,Deep learning,Attention mechanism
Journal
545
ISSN
Citations 
PageRank 
0020-0255
0
0.34
References 
Authors
0
4
Name
Order
Citations
PageRank
Dongmin Hyun172.82
Chanyoung Park216312.04
Junsu Cho352.13
Hwanjo Yu41715114.02