Understanding Latent Factors Using a GWAP

Kunkel, J., Loepp, B., & Ziegler, J. (to appear). RecSys ’18: Poster Proceedings of the 12th ACM Conference on Recommender Systems.

Abstract

Recommender systems relying on latent factor models are well-known for generating accurate recommendations, but often appear intransparent for users. Semantic descriptions for the factors might help to mitigate this problem. Achieving this automatically is, however, a non-straightforward task due to the models’ statistical nature. We present an output-agreement game that represents factors by means of sample items and motivates players to create such descriptions. A user study shows that players enjoyed the game while the collected output reflects real-world characteristics of the factors.

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