Abstract
Tasks of perceptual matching, including three types of visual stimulus (slope of line, position of dot and size of gap in contour) were devised. Seventy-four patients with unilateral cortical lesions were tested. The right parietal group was impaired on the perceptual matching tasks. There was no association between performance on perceptual matching tasks and tachistoscopic threshold measurements or a test of picture recognition. The relationship between perceptual matching and performance on other more complex visual tasks is discussed.
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