title: Cognitively based apparent motion: an extreme case.
abstract: An ambiguous figure is used to provide a demonstration of apparent motion in which there is no change in the retinal image or in external space.
authors.affiliation: Department of Psychology, University of California at Davis 95616, USA.
authors.forename: T E
authors.initials: TE
authors.lastname: Parks
authors.forename: R G
authors.initials: RG
authors.lastname: Coss
mesh_terms: D006801:Humans; D009039:Motion Perception; D009903:Optical Illusions; D010781:Photography