Premium
Measurement of Electroencephalic Evoked Response: Comparison of Univariate and Multivariate
Author(s) -
Schachter J.,
Lachin J. M.,
Kerr J. L.,
Wimberly F. C.
Publication year - 1976
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.1976.tb00110.x
Subject(s) - univariate , multivariate statistics , multivariate analysis , psychology , multivariate analysis of variance , statistic , statistics , univariate analysis , audiology , mathematics , medicine
Two univariate peak‐to‐peak measures of electroencephalic average evoked response (AER) were compared with two multivariate measures of AER with respect to: (1) ability to discriminate between stimuli of different intensity; and 2) test‐retest reliability. AER data from 47 sleeping newborns for each of 2 test sessions were utilized to calculate P 2 ‐N 2 amplitude, t p2‐n2 (the test statistic which measures the degree to which the P 2 ‐N 2 amplitude differed from zero), F 1 (a multivariate measure of the degree to which changes in potential differed from zero), and F jk (a multivariate measure of degree to which changes in potential differed from changes in potential in background EEG). The multivariate measures were somewhat superior to the univariate measures in the ability to discriminate three stimulus intensities when used as the dependent measure of AER in 47 subjects, though differences between measures were small. At the same time the multivariate measures were somewhat inferior to the univariate measures in retest reliability. There were major discrepancies between the multivariate and univariate measures of AER for some individuals. Comparison of the two multivariate measures indicates that in these data from sleeping new‐borns, use of background EEG as a baseline reference for the multivariate measure. Fjk, decreased its reliability without enhancing its ability to distinguish stimulus intensities.