title: Perceived object shape affects the perceived direction of self-movement.
abstract: The 'direct-perception' model of heading perception posits that heading is computed directly from optic flow without an intervening structural representation of environmental layout. Here, I give an example in which such a representation is seen to play a role in the interpretation of optic flow. Manipulating the outline of concave objects to give an erroneous percept of convexity caused the perceived direction of heading during a stimulated approach to change as well. Thus, the representation of environmental structure provides the context for using and interpreting image motion.
authors.affiliation: Cambridge Basic Research, Nissan Research & Development Inc., 4 Cambridge Center, MA 02142, USA. beusmans@pathfinder.cbr.com
authors.forename: J M
authors.initials: JM
authors.lastname: Beusmans
mesh_terms: D005556:Form Perception / Q000502:physiology*; D006801:Humans; D009039:Motion Perception / Q000502:physiology*; D011581:Psychological Tests