Two people sitting next to each other in a coffee house can get wildly different results from the same Google search. Many Facebook users see only posts from friends who agree with them because Facebook is hiding posts from other friends. These two sites, and many others, use filtering software to personalize our Web experience. In this short, thought-provoking talk, Eli Pariser said this software is rapidly creating a world in which “the Internet is showing us what it thinks we want to see, but not necessarily what we need to see.”

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