Japanese Psychological Research
Online ISSN : 1468-5884
Print ISSN : 0021-5368
Asymmetrical inhibition of reaction times in double stimulation situations
HITOSHI HONDA
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Volume 23 (1981) Issue 1 Pages 43-48

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Abstract

Using 22 right-handed subjects, inhibitory effects of the first stimulus (S1) to the second stimulus (S2) specifically on reaction time (RT) in double visual-visual stimulation situations were examined from the viewpoint of hemispheric input/output coupling. When the two stimuli were presented in the opposite visual half-fields, the RT of the left hemisphere (right hand) to S2 after the projection of S1 into the right hemisphere was significantly longer than the RT of the right hemisphere (left hand) to S2 after the projection of S1 into the left hemisphere. When the two stimuli were presented in the same visual half-field, such asymmetrical inhibition of RTs was no longer observed. The results were interpreted as the manifestation of an asymmetrical interhemispheric interference closely related to the hemispheric motor control of right-handed subjects.

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