Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Science 26 November 1965:
Vol. 150. no. 3700, pp. 1187 - 1188
DOI: 10.1126/science.150.3700.1187
Prev | Table of Contents | Next

Articles

Evoked-Potential Correlates of Stimulus Uncertainty

Samuel Sutton 1, Margery Braren 1, Joseph Zubin 1, and E. R. John 2

1 Biometrics Research, New York State Department of Mental Hygiene and Columbia University, New York
2 Brain Research Laboratories, Department of Psychiatry, NewYork Medical College, New York

The average evoked-potential waveforms to sound and light stimuli recorded from scalp in awake human subjects show differences as a function of the subject's degree of uncertainty with respect to the sensory modality of the stimulus to be presented. Differences are also found in the evoked potential as a function of whether or not the sensorymodality of the stimulus was anticipated correctly. The major waveform alteration is in the amplitude of a positive-going component which reaches peak amplitude at about 300 milliseconds.

ADVERTISEMENT
Click Me!

ADVERTISEMENT
Click Me!

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)