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Do perceptual asymmetries differ in peripersonal and extrapersonal space?

Published online by Cambridge University Press:  19 October 2009

NICOLE A. THOMAS  and
LORIN J. ELIAS
NICOLE A. THOMAS*
Affiliation:
Department of Psychology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
LORIN J. ELIAS
Affiliation:
Department of Psychology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
*
*Correspondence and reprint requests to: Nicole Thomas, Department of Psychology, 9 Campus Drive, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5A5, Canada. E-mail: [email protected]
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Abstract

A space-based dissociation has been observed in clinical hemineglect, wherein neglect can be specific to either peripersonal or extrapersonal space. This same dissociation might occur in pseudoneglect, where both space-based and visual field differences have been observed. Upper and bottom visual field differences were examined within-subjects (N = 39), by presenting the greyscales task in both peripersonal and extrapersonal space. The leftward bias was strongest in the bottom visual field; however, no space-based differences were observed. It appears that perceptual biases differ between the upper and bottom visual fields, but this is not related to space-based perceptual biases. (JINS, 2010, 16, 210–214.)

Keywords

Spatial attentionLateral biasesPseudoneglectVisual field differencesNear spaceFar spaceLaterality
Type
Brief Communications
Information
Journal of the International Neuropsychological Society , Volume 16 , Issue 1 , January 2010 , pp. 210 - 214
Copyright
Copyright © The International Neuropsychological Society 2009

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