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Traditional information retrieval models assume that users express their information needs via text queries (i.e., their "talk"). In this poster, we consider Web browsing behavior outside of interactions with retrieval systems (i.e., users' "walk") as an alternative source of signal describing users' information needs, and compare it to the query-expressed information needs on a large dataset. Our findings demonstrate that information needs expressed in different behavior modalities are largelydoi:10.1145/1390334.1390461 dblp:conf/sigir/BilenkoWRM08 fatcat:xrupwc3ilvhk3frtoye55x43n4