News Recommenders: Real-Time, Real-Life Experiences
Refereed Conference Meeting Proceeding
Recommender systems have become an essential part of our daily lives. In this work we present our early experiences when it comes to a real-world news recommendation task in the guise of the 2014 NewsREEL challenge . NewsREEL participants respond to recommendation requests with their suggestions and, crucially, received live-user feedback in the form of click-through data, providing an opportunity for a large-scale evaluation of recommender systems in the wild. In contrast to other domains (books, movies, etc.), news has a greater item churn [2,4] and users are much more sensitive to article recency . Furthermore, user profiles are typically constrained to the current session  or at best defined by browser cookies . Moreover, it is atypical for users to evaluate articles explicitly and feedback is commonly collected implicitly by observing user behaviour . Finally, there is a low consumption cost associated with reading a news article which can result in a larger than normal diversity of the consumed items . Within the context of the NewsREEL challenge  (formerly, The News Recommender System Challenge (NRS’13)), Said et al.  study the performance of similarity- and recency-based algorithms. They find that both types perform slightly better when recommending in general news sites than in more topic focussed sites. Others [4,5] recommend representing a news article using a combination of metadata and contextual features; see  for a full list of such features available for the NewsREEL challenge.
The 23rd Conference on User Modelling, Adaptation and Personalization
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National University of Ireland, Dublin (UCD)
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