Interpreting Contextual E ects By Contextual Modeling In Recommender Systems

Recommender systems have been widely applied to assist user’s decision making by providing a list of personalized item recommendations. Context-aware recommender systems (CARS) additionally take context information into considering in the recommendation process, since user’s tastes on the items may vary from contexts to contexts. Several context-aware recommendation algorithms have been proposed and developed to improve the quality of recommendations. However, there are limited research which explore and discuss the capability of interpreting the contextual e ects by the recommendation models. In this paper, we speci cally focus on di erent contextual modeling approaches, reshape the structure of the models, and exploit how to utilize the existing contextual modeling to interpret the contextual e ects in the recommender systems. We compare the explanations of contextual e ects, as well as the recommendation performance over two-real world data sets in order to examine the quality of interpretations.