Visual PerceptionAuthor's Note: Original version supported by NEI grant R01 EY 12926-06; revision supported by NSF grant BCS 1027120/1027259. Correspondence: MK & WE-Department of Psychology, PO Box 400400, University of Virginia, Charlottesville, VA 22904-4400 (e-mail: kubovy@virginia.edu, we7v@virginia.edu). SG-Vision Center Laboratory & Systems Neurobiology Laboratory, The Salk Institute for Biological Studies, 10010 N. Torrey Pines Road, La Jolla, CA 92037 (e-mail: sergei@salk.edu).