Evoked Potential Correlates of Expected Stimulus Intensity

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Science  23 Feb 1973:
Vol. 179, Issue 4075, pp. 814-816
DOI: 10.1126/science.179.4075.814


The electrophysiological responses to a flash of medium intensity have different wave shapes in trials in which the occurrence of bright stimuli or dim stimuli is expected. When a bright or dim stimulus is signaled, the potentials evoked by the medium stimulus resemble the responses evoked by a real bright or dim flash.