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Contrast effects on the auditory evoked response and its relation to psychophysical judgments |
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| Authors: | Monte Buchsbaum Julian Silverman Robert I Henkin Adolf Pfefferbaum |
| Institution: | 1. National Institutes of Health, 20014, Bethesda, Maryland 2. U.S. Department of Health, Education, and Welfare, Laboratory of Psychology, National Institute of Mental Health, Public Health Service, USA 4. U.S. Department of Health, Education, and Welfare, Adult Psychiatry Branch, National Institute of Mental Health, Public Health Service, USA 5. U.S. Department of Health, Education, and Welfare, National Heart Institute, National Institutes of Health, Public Health Service, USA |
| Abstract: | An auditory average evoked response (AER) procedure was used to search for a physiological counterpart of the contrast effect-the tendency for a S’s judgment of the intensity of a stimulus to be modified by the intensity of prior stimulation. When a tone was preceded by a softer tone, its AER amplitude increased; conversely, when a tone followed a louder tone, amplitude decreased. Irregular intervals between tones decreased the AER contrast effect, as did increasing the interval between tones. Further, significant correlations were found between individual scores on the AER contrast procedure and performance on a battery of psychophysical tasks. |
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