News aggregators rely on links and users votes to select and present subsets of the large quantity of news and opinion items generated each day. Opinion diversity in the output sets can provide several benefits. We outline a range of diversity goals and discuss user reactions to a pilot implementation that selects for diversity as well as popularity. We then describe plans for research on alternative presentations and their impacts on users. Keywords Diversity, recommender systems, politics, bias, presentation, blogs, news aggregator ACM Classification Keywords H.5.m Miscellaneous
Sean A. Munson, Daniel Xiaodan Zhou, Paul Resnick