It recently came to my attention that I was waging a war across multiple fronts and fatigue had struck — they were winning. For months I had battled, fighting their persistence with my propensity to click x.
Recommender systems provide users with content they might be interested in. Conventionally, recommender systems are evaluated mostly by using prediction accuracy metrics only. But, the ultimate goal of a recommender system is to increase user satisfaction.
A. Nauerz, S. Pietschmann, and R. Pietzsch. Proceedings of the 3rd International Workshop on Adaptation and Evolution in Web Systems Engineering at 8th International Conference on Web Engineering 2008, (Jul 16, 2008)