NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Stimulus novelty, task relevance and the visual evoked potential in manThe visual evoked potential (VEP) to rare, task-relevant (counted) numerical stimuli was compared with VEPs to rare, task-irrelevant stimuli, both being randomly interspersed within a sequence of tachistoscopically-flashed background numbers. These task-irrelevant stimuli were of two classes: (1) easily recognizable (e.g., simple geometric shapes) and (2) completely novel (i.e., complex, colorful abstract-type drawings which were unrecognizable). It was found that such novel stimuli did, in fact, evoke large P3 waves, but they had different scalp distributions from those which followed the task-relevant stimuli. This indicates that at least two types of late positive P3 waves exist, differing both in brain source and psychological correlates.
Document ID
19750057377
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Courchesne, E.
Hillyard, S. A.
Galambos, R.
(California, University La Jolla, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
August 1, 1975
Publication Information
Publication: Electroencephalography and Clinical Neurophysiology
Volume: 39
Subject Category
Aerospace Medicine
Accession Number
75A41449
Funding Number(s)
CONTRACT_GRANT: NGR-05-009-198
CONTRACT_GRANT: NIH-1-R01-MH-25594
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available