Measurement and definition of changes in the visual evoked potential to different stimulus intensities

Dragutinovich S. (1987) Measurement and definition of changes in the visual evoked potential to different stimulus intensities. International Journal of Psychophysiology, 5 2: 125-133. doi:10.1016/0167-8760(87)90016-X


Author Dragutinovich S.
Title Measurement and definition of changes in the visual evoked potential to different stimulus intensities
Journal name International Journal of Psychophysiology   Check publisher's open access policy
ISSN 0167-8760
Publication date 1987
Sub-type Article (original research)
DOI 10.1016/0167-8760(87)90016-X
Volume 5
Issue 2
Start page 125
End page 133
Total pages 9
Subject 2802 Behavioral Neuroscience
Abstract Visual evoked potentials (VEPs) were recorded from the vertex to 5 intensities of light flashes. Measures were taken of peak-to-trough, prestimulus baseline-to-peak, and timeband amplitude for P1, N1, and P2 waveforms. Augmenting/reducing was defined by traditional (amplitude/intensity slope, monotonicity) and non-traditional (strength of the nervous system, combined amplitude response) criteria. In support of Connolly and Gruzelier [(1982) Psychophysiology, 19: 599-608], analyses showed that data collected by traditional methods contravened assumptions underlying VEP augmenting/reducing methodology. Specifically, 20% of total peaks occurred outside designated timebands, amplitude/intensity slopes explained only 30-46% variance, and levels of agreement between different definitions were low. Researchers ought to ensure that VEPs are admissible before using them or consider employing non-traditional criteria to avoid rejecting large numbers of inadmissible data.
Keyword Augmenting/reducing
Definition
Evoked potential
Slope
Timeband
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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