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Science 10 July 1964:
Vol. 145. no. 3628, pp. 180 - 182
DOI: 10.1126/science.145.3628.180
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Articles

Attention, Vigilance, and Cortical Evoked-Potentials in Humans

Manfred Haider 1, Paul Spong 1, and Donald B. Lindsley 1

1 Department of Psychology, University of California, Los Angeles

Computer-averaged potentials evoked from the cortex were recorded to nonsignal stimuli and to randomly interspersed signal stimuli requiring detection and response during prolonged visual vigilance. As detection efficiency diminished over time, the amplitude of evoked responses to nonsignal stimuli decreased and latency increased. Fluctuations in vigilance (attentiveness) during the course of the task also were accompanied by corresponding changes in evoked-potentials to nonsignal stimuli. More specific lapses of attention, revealed by detection failures, resulted in average evoked-responses of lower amplitude to missed as compared with detected signals.


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