| Abstract: | This research was concerned with same-different reaction time to two stimuli presented simultaneously, one to the left and one to the right visual field, so that they projected to separate cerebral hemispheres. In experiment 1, subjects compared two colour patches, two colour words, or a colour word with a colour patch. In experiment 2, subjects compared two geometric shapes, two shape words, or a geometric shape with a shape word. Comparisons of two colours or two shapes were faster than comparisons of words that named these attributes. Responses to colours were faster than to shapes, and responses to colour words were faster than to shape words. Within-mode comparisons were faster than between-mode comparisons. Direct access of the separate stimuli to the dominant hemispheres did not produce faster responses. |
