The Bilateral Effect: Callosal Inhibition or Intrahemispheric Competition?

The magnification of visual field asymmetry observed with bilateral compared to unilateral tachistoscopic presentation of homologous stimuli (bilateral effect) can be explained by two hypothetical processes: homologous activation with subsequent inhibition of callosal information transfer or intrahe...

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Veröffentlicht in:Brain and cognition 2001-04, Vol.45 (3), p.317-324
Hauptverfasser: Olk, Bettina, Hartje, Wolfgang
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Hartje, Wolfgang
description The magnification of visual field asymmetry observed with bilateral compared to unilateral tachistoscopic presentation of homologous stimuli (bilateral effect) can be explained by two hypothetical processes: homologous activation with subsequent inhibition of callosal information transfer or intrahemispheric competition for processing resources. A lexical decision task with unilateral and bilateral stimulation and response with the right or left hand was used in an attempt to decide between these hypotheses. Analysis of response time data revealed a bilateral effect, superimposed on a right visual field advantage, and no interaction between visual field and response hand. Results are consistent with the hypothesis of intrahemispheric competition in the left hemisphere.
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source MEDLINE; Elsevier ScienceDirect Journals Complete
subjects Adult
Anatomical correlates of behavior
Behavioral psychophysiology
bilateral effect
Biological and medical sciences
Corpus Callosum - physiology
Female
Fixation, Ocular - physiology
Functional Laterality - physiology
Fundamental and applied biological sciences. Psychology
Humans
Key Words: visual field asymmetry
lexical decision
Male
Neural Inhibition - physiology
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Reaction Time - physiology
Visual Fields - physiology
Visual Perception - physiology
title The Bilateral Effect: Callosal Inhibition or Intrahemispheric Competition?
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