Coevolutionary Recommendation Model: Mutual Learning between Ratings and Reviews

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Title: Coevolutionary Recommendation Model: Mutual Learning between Ratings and Reviews
Authors: Lu, Yichao
Dong, Ruihai
Smyth, Barry
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Date: 27-Apr-2018
Online since: 2019-04-16T09:01:29Z
Abstract: Collaborative filtering (CF) is a common recommendation approach that relies on user-item ratings. However, the natural sparsity of user-item rating data can be problematic in many domains and settings, limiting the ability to generate accurate predictions and effective recommendations. Moreover, in some CF approaches latent features are often used to represent users and items, which can lead to a lack of recommendation transparency and explainability. User-generated, customer reviews are now commonplace on many websites, providing users with an opportunity to convey their experiences and opinions of products and services. As such, these reviews have the potential to serve as a useful source of recommendation data, through capturing valuable sentiment information about particular product features. In this paper, we present a novel deep learning recommendation model, which co-learns user and item information from ratings and customer reviews, by optimizing matrix factorization and an attention-based GRU network. Using real-world datasets we show a significant improvement in recommendation performance, compared to a variety of alternatives. Furthermore, the approach is useful when it comes to assigning intuitive meanings to latent features to improve the transparency and explainability of recommender systems.
Funding Details: Science Foundation Ireland
Type of material: Conference Publication
Publisher: ACM
Copyright (published version): 2018 IW3C2 (International World Wide Web Conference Committee)
Keywords: Collaborative filtering (CF)Recommendation modelRecommender systems
DOI: 10.1145/3178876.3186158
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Language: en
Status of Item: Peer reviewed
Is part of: WWW '18 Proceedings of the 2018 World Wide Web Conference
Conference Details: The 2018 World Wide Web Conference (WWW 2018), Lyon, France, 23-27 April 2018
ISBN: 978-1-4503-5639-8
Appears in Collections:Insight Research Collection

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