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Science 18 February 1983:
Vol. 219. no. 4586, pp. 874 - 876
DOI: 10.1126/science.6823555
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Articles

Science, Vol 219, Issue 4586, 874-876
Copyright © 1983 by American Association for the Advancement of Science

articles

Schizophrenia: a neurophysiological evaluation of abnormal information processing

J Baribeau-Braun, TW Picton, and JY Gosselin

Evoked potential indices of an early and late stage of attentional processing were recorded from schizophrenic and normal subjects during dichotic listening tasks. Despite slow and inaccurate detections, the schizophrenic subjects were able to focus selectively to different ears but only at a fast stimulation rate, showing integrity of the early selective stage. They showed an abnormal late stage, indicating inefficiency in processing information from detected targets. Marked deficits at a slow stimulation rate and during divided attention suggest that the schizophrenic attention disorder is one of control and maintenance of a selective processing strategy rather than of general slowness or absence of selectivity.


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