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We hypothesized that the impairment is due to a failure in the processing of one of the two binocular cues to motion in depth: changes in binocular disparity over time or interocular velocity differences. We isolated the contributions of these two cues and found that sensitivity to interocular velocity differences, but not changes in binocular disparity, varied systematically with observers\u2019 ability to judge motion direction. We therefore conclude that the inability to interpret motion in depth is due to a failure in the neural mechanisms that combine velocity signals from the two eyes. Given these results, we argue that the deficit should be considered a prevalent but previously unrecognized agnosia specific to the perception of visual motion.<\/jats:p>","DOI":"10.1177\/0956797616663488","type":"journal-article","created":{"date-parts":[[2016,9,27]],"date-time":"2016-09-27T22:49:13Z","timestamp":1475016553000},"page":"1474-1485","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":8,"title":["Impaired Velocity Processing Reveals an Agnosia for Motion in Depth"],"prefix":"10.1177","volume":"27","author":[{"given":"Martijn","family":"Barendregt","sequence":"first","affiliation":[{"name":"Department of Experimental Psychology, Helmholtz Institute, Utrecht University"},{"name":"Department of Experimental and Applied Psychology, Vrije Universiteit Amsterdam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Serge O.","family":"Dumoulin","sequence":"additional","affiliation":[{"name":"Department of Experimental Psychology, Helmholtz Institute, Utrecht University"},{"name":"Spinoza Center for Neuroimaging, Amsterdam, The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bas","family":"Rokers","sequence":"additional","affiliation":[{"name":"Department of Psychology, University of Wisconsin\u2013Madison"},{"name":"McPherson Eye Research Institute, University of Wisconsin\u2013Madison"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2016,9,29]]},"reference":[{"key":"bibr1-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1016\/j.cub.2010.11.017"},{"key":"bibr2-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1167\/iovs.15-17696"},{"key":"bibr3-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1162\/0898929054475154"},{"key":"bibr4-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1016\/j.visres.2014.09.008"},{"key":"bibr5-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1163\/156856897X00357"},{"key":"bibr6-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0000343"},{"key":"bibr7-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1016\/0042-6989(94)90162-7"},{"key":"bibr8-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1152\/jn.00585.2009"},{"key":"bibr9-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1167\/12.4.7"},{"key":"bibr10-0956797616663488","doi-asserted-by":"publisher","DOI":"10.3758\/s13414-015-0881-x"},{"key":"bibr11-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1016\/j.visres.2004.12.005"},{"key":"bibr12-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1068\/p5404"},{"key":"bibr13-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1163\/156856808786451462"},{"key":"bibr14-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1177\/2041669515593028"},{"key":"bibr15-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1016\/0042-6989(89)90093-X"},{"key":"bibr16-0956797616663488","volume-title":"Foundations of cyclopean perception","author":"Julesz B.","year":"1971"},{"key":"bibr17-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1002\/ajmg.a.31343"},{"key":"bibr18-0956797616663488","first-page":"S14","volume":"36","author":"Kleiner M.","year":"2007","journal-title":"Perception"},{"key":"bibr19-0956797616663488","doi-asserted-by":"publisher","DOI":"10.3389\/fpsyg.2010.00155"},{"key":"bibr20-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1163\/156856897X00366"},{"key":"bibr21-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1016\/0042-6989(93)90114-C"},{"key":"bibr22-0956797616663488","first-page":"806","volume":"27","author":"Regan D.","year":"1986","journal-title":"Investigative Ophthalmology & Visual Science"},{"key":"bibr23-0956797616663488","doi-asserted-by":"publisher","DOI":"10.1163\/156856809786618501"},{"key":"bibr24-0956797616663488","first-page":"904","volume":"12","author":"Richards W.","year":"1973","journal-title":"Investigative Ophthalmology & Visual Science"},{"key":"bibr25-0956797616663488","doi-asserted-by":"crossref","unstructured":"Riddoch G. 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