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Broadcast media are declining in their power to decide which issues and viewpoints will reach large audiences. But new information filters are appearing, in the guise of recommender systems, aggregators, search engines, feed ranking algorithms, and the sites we bookmark and the people and organizations we choose to follow on Twitter. Sometimes we explicitly choose our filters; some we hardly even notice. Critics worry that, collectively, these filters will isolate people in information bubbles only partly of their own choosing, and that the inaccurate beliefs they form as a result may be difficult to correct. But should we really be worried, and, if so, what can we do about it? Our panelists will review what scholars know about selectivity of exposure preferences and actual exposure and what we in the CSCW field can do to develop and test ways of promoting diverse exposure, openness to the diversity we actually …