MovieLens unplugged: experiences with an occasionally connected recommender system
Proceedings of the 8th international conference on Intelligent user interfaces
Participation Incentive Mechanisms in Peer-to-Peer Subscription Systems
HICSS '02 Proceedings of the 35th Annual Hawaii International Conference on System Sciences (HICSS'02)-Volume 9 - Volume 9
Evaluating collaborative filtering recommender systems
ACM Transactions on Information Systems (TOIS)
Using social psychology to motivate contributions to online communities
CSCW '04 Proceedings of the 2004 ACM conference on Computer supported cooperative work
User Motivation and Persuasion Strategy for Peer-to-Peer Communities
HICSS '05 Proceedings of the Proceedings of the 38th Annual Hawaii International Conference on System Sciences - Volume 07
Motivating participation by displaying the value of contribution
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
User Modeling and User-Adapted Interaction
Results from deploying a participation incentive mechanism within the enterprise
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
A web-based annotation tool supporting e-learning
Proceedings of the Working Conference on Advanced Visual Interfaces
Motivating cooperation on peer to peer networks
UM'03 Proceedings of the 9th international conference on User modeling
An economic model of user rating in an online recommender system
UM'05 Proceedings of the 10th international conference on User Modeling
Social navigation support through annotation-based group modeling
UM'05 Proceedings of the 10th international conference on User Modeling
Towards adaptive recruitment and engagement mechanisms in social systems
UMAP'11 Proceedings of the 19th international conference on Advances in User Modeling
The other side of the social web: a taxonomy for social information access
Proceedings of the 18th Brazilian symposium on Multimedia and the web
Exploring personality-targeted UI design in online social participation systems
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
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User participation emerged as a critical issue for collaborative and social recommender systems as well as for a range of other systems based on the power of user community. A range of mechanisms to encourage user participation in social systems has been proposed over the last few years; however, the impact of these mechanisms on users behavior in recommender systems has not been studied sufficiently. This paper investigates the impact of encouraging user participation in the context of CourseAgent, a community-based course recommender system. The recommendation power of CourseAgent is based on course ratings provided by a community of students. To increase the number of course ratings, CourseAgent applies an incentive mechanism which turns user feedback into a self-beneficial activity. In this paper, we describe the design and implementation of our course recommendation system and its incentive mechanism. We also report a dual impact of this mechanism on user behavior discovered in two user studies.