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Brain Cogn. 2011 Dec;77(3):391-400. doi: 10.1016/j.bandc.2011.08.019. Epub 2011 Sep 29.

Right visual field advantage for perceived contrast: correlation with an auditory bias and handedness.

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1
Department of Psychology, University of Turku, 20014 Turku, Finland. hmrail@utu.fi

Abstract

Studies have suggested that supramodal attentional resources are biased rightward due to asymmetric spatial fields of the two hemispheres. This bias has been observed especially in right-handed subjects. We presented left and right-handed subjects with brief uniform grey visual stimuli in either the left or right visual hemifield. Consistent with the proposed asymmetry in attentional resources, right-handed subjects estimated right hemifield targets as having a higher contrast than physically identical stimuli presented in the left hemifield. Left-handed participants did not show a systematic rightward or leftward bias. However, the group of left-handed participants also took part in a dichotic listening experiment whose results showed that visual bias score correlated positively with ear-advantage in dichotic listening. Our results are consistent with the view that supramodal processing resources are biased towards the right hemispace, and that this bias is influenced by handedness.

PMID:
21962763
DOI:
10.1016/j.bandc.2011.08.019
[Indexed for MEDLINE]
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