Evoked Potential Correlates of Signal Recognition between and within Modalities

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Science  03 Aug 1973:
Vol. 181, Issue 4098, pp. 465-466
DOI: 10.1126/science.181.4098.465


Electrical responses evoked by clicks, flashes, changes in noise level, and changes in light level were recorded from the scalps of human subjects set to detect one of the stimuli. An early negative component of the evoked responses reflects selection between sensory modalities, whereas the later positive component reflects a more complex intramodal discrimination.