Walsh, G., Golbeck, J. (October 2009)
Collection recommender systems suggest groups of items that work well as a whole. The interaction ef- fects between items is an important consideration, but the vast space of possible collections makes it difficult to analyze. In this paper, we present a class of games with a purpose for building collections where users cre- ate collections and, using an output agreement model, they are awarded points based on the collections that match. The data from these games will help researchers develop guidelines for collection recommender systems among other applications. We conducted a pilot study of the game prototype which indicated that it was fun and challenging for users, and that the data obtained had the characteristics necessary to gain insights into the interaction elects among items. We present the game and these results followed by a discussion of the next steps necessary to bring games to bear on the prob- lem of creating harmonious groups.