Refers to the inability to see an object or a person

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refers to the inability to see an object or a person in our midst. Simmons and Chabris (1999) showed that half of the observers failed to see the gorilla suited assistant in a ball passing game. Daniel Simons, University of Illinois 17 Change Blindness Change Blindness Change blindness is a form of inattentional blindness in which two thirds of individuals giving directions failed to notice a change in the individual asking for directions. © 1998 Psychonomic Society Inc. Image provided courtesy of Daniel J. Simmons. Change Blindness Demos Change Blindness Demos Airplane Chopper & Truck Couple at Dinner
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19 Perceptual Illusions Perceptual Illusions Illusions provide good examples in understanding how perception is organized. Studying faulty perception is as important as studying other perceptual phenomena. Line AB is longer than line BC. 20 Perceptual Organization The whole is greater than the sum of its parts Gestalt psychologists showed that a figure formed a “whole” different than its surroundings. 21 Organization of the visual field into objects (figures) that stand out from their surroundings (ground). Figure/Ground Separation Figure/Ground Separation
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