Necessity of spatial pooling for the perception of heading in nonrigid environments.

Full Abstract

This study examined whether the perception of heading is determined by spatially pooling velocity information. Observers were presented displays simulating observer motion through a volume of 3-D objects. To test the importance of spatial pooling, the authors systematically varied the nonrigidity of the flow field using two types of object motion:
adding a unique rotation or translation to each object. Calculations of the signal-to-noise (observer velocity-to-object motion) ratio indicated no decrements in performance when the ratio was .39 for object rotation and .45 for object translation. Performance also increased with the number of objects in the scene. These results suggest that heading is determined by mechanisms that use spatial pooling over large regions.

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Author information

Author/s: Andersen, George J (GJ); Saidpour, Asad (A);

Affiliation: Andersen(-atsign-)citrus.ucr.edu

Grants: 1 R01 AG13419-01 (Agency:NIA NIH HHS)

Journal and publication information

Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.

Journal: Journal of experimental psychology. Human perception and performance (J Exp Psychol Hum Percept Perform), published in United States. (Language: eng)

Reference: 2002-Oct; vol 28 (issue 5) : pp 1192-201

Dates: Created 2002/11/07; Completed 2003/02/26; Revised 2007/11/14;

PMID: 12421064, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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