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| Research article summary (published 30 Aug 2002): |
Retinal flow is sufficient for steering during observer rotation.
Full Abstract
How do people control locomotion while their eyes are simultaneously rotating? A previous study found that during simulated rotation, they can perceive a straight path of self-motion from the retinal flow pattern, despite conflicting extraretinal information, on the basis of dense motion parallax and reference objects. Here we report that the same information is sufficient for active control ofjoystick steering. Participants steered toward a target in displays that simulated a pursuit eye movement. Steering was highly inaccurate with a textured ground plane (motion parallax alone), but quite accurate when an array of posts was added (motion parallax plus reference objects). This result is consistent with the theory that instantaneous heading is determined from motion parallax, and the path of self-motion is determined by updating heading relative to environmental objects. Retinal flow is thus sufficient for both perceiving self-motion and controlling self-motion with a joystick; extraretinal and positional information can also contribute, but are not necessary.
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Author information
Author/s: Li, Li (L); Warren, William H (WH);
Affiliation: Department of Cognitive and Linguistic Sciences, Brown University, Providence, RI 02912, USA. lli@mail.arc.nasa.gov
Grants: EY10923 (Agency:United States NEI) ; K02 MH01353 (Agency:United States NIMH)
Journal and publication information
Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S.
Journal: Psychological science : a journal of the American Psychological Society / APS (Psychol Sci), published in United States. (Language: eng)
Reference: 2002-Sep; vol 13 (issue 5) : pp 485-91
Dates: Created 2002/09/10; Completed 2002/10/21; Revised 2007/11/14;
PMID: 12219819, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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