Using Contextual Information as Virtual Items on Top-N Recommender Systems

Details Using Contextual Information as Virtual Items on Top-N Recommender Systems Using Contextual Information as Virtual Items on Top-N Recommender Systems

2011-11-12

arxiv.org/abs/1111.2948v2

Computer Science

Learning

Workshop on Context-Aware Recommender Systems (CARS'09) in conjunction with the 3rd ACM Conference on Recommender Systems (Rec

Scientific paper

Traditionally, recommender systems for the Web deal with applications that have two dimensions, users and items. Based on access logs that relate these dimensions, a recommendation model can be built and used to identify a set of N items that will be of interest to a certain user. In this paper we propose a method to complement the information in the access logs with contextual information without changing the recommendation algorithm. The method consists in representing context as virtual items. We empirically test this method with two top-N recommender systems, an item-based collaborative filtering technique and association rules, on three data sets. The results show that our method is able to take advantage of the context (new dimensions) when it is informative.

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