Abstract

Although color processing is one of the important features in visual information processing in humans, little is known about color processing in the human brain. In the present study, we asked two questions using human subjects. First, we asked how color stimulation of different hues (wavelengths) is processed within the brain. Second, we asked whether or not hemispheric differences exist between the right and left hemispheres in the processing of color stimulation. To answer these questions, we presented chromatic stimuli, matched photometrically in luminance, on an achromatic background or on an achromatic circle of the same size with the same luminance, and measured simple and discriminative reaction times (RTs) as well as latencies of alphablockings in EEG induced by these color stimuli.

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