Sensation and perception, as well as motor functions, have played an important role in the history of psychology. Although tests of these abilities are sometimes included in neuropsychological assessments, comparisons of intraindividual performances on the two sides of the body (as a basis for drawing conclusions and comparisons about the functional status of the two cerebral hemispheres) are in many instances neglected or considered only casually. This study, utilizing several motor and sensory-perceptual tests, compared intraindividual differences on the two sides of the body in a group of controls and a group of persons with brain damage. The results indicated that the sensory-perceptual tests were particularly effective in differentiating the groups. More than 60% of the group with brain damage had greater differences on the two sides of the body than did any of the controls. These findings suggest that a substantial proportion of persons with cerebral disease or damage may be subject to unequivocal identification using sensory-perceptual tests that take only about 20 minutes to administer. These tests may serve a valuable role as an adjunct to comprehensive neuropsychological evaluation and should be further evaluated in this respect.
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