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J. Ben Schafer is completing his Ph.D. in the Department of Computer Science and Engineering at the University of Minnesota. Ben’s research has included projects in agent-assisted interfaces, human-computer interaction, artificial intelligence, collaborative information filtering, and electronic commerce. His dissertation is entitled “MetaLens: Improving Recommender Systems for Electronic Commerce through the use of Multiple Data Sources.”

Joseph A. Konstan is Associate Professor of Computer Science and Engineering at the University of Minnesota. Prof. Konstan holds a Ph.D. in Computer Science from the University of California, Berkeley, where he completed

a dissertation on user interface toolkit technology. Since then, he has worked on a variety of human-computer interaction projects focused on collaborative information filtering, automation and authoring, multimedia, and

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John Riedl has been a member of the faculty of the computer science department of the University of Minnesota since March 1990. His research is focussed on collaborative systems, which are computer systems that help groups of people work together more effectively. Since 1992 he has been co-directing the GroupLens Research project on collaborative information filtering. In 1996 he co-founded Net Perceptions, a leading one-to-one real- time marketing company. Riedl is Associate Professor at the University, and Director and Chief Scientist at Net Perceptions. Riedl received the B.S. degree in mathematics from the University of Notre Dame, Notre Dame, IN in 1983 and the M.S. and Ph.D. degrees in computer science from Purdue University, West Lafayette, IN in 1985 and 1990, respectively.

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