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EXTRAVERSION—INTROVERSION AND THE EEG
Author(s) -
GALE ANTHONY,
COLES MICHAEL,
BLAYDON JENNIFER
Publication year - 1969
Publication title -
british journal of psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.536
H-Index - 92
eISSN - 2044-8295
pISSN - 0007-1269
DOI - 10.1111/j.2044-8295.1969.tb01194.x
Subject(s) - extraversion and introversion , electroencephalography , psychology , eyes open , alpha (finance) , audiology , filter (signal processing) , personality , developmental psychology , social psychology , neuroscience , psychometrics , computer vision , computer science , big five personality traits , medicine , construct validity , balance (ability)
Studies relating measures of the EEG to extraversion—introversion are reviewed and criteria set up for their evaluation. A new measure of mean dominant frequency is proposed. Extravert and introvert EEGs are compared, firstly across the whole frequency range (with eyes closed) and secondly across theta, alpha and beta ranges under alternating conditions of eyes closed/eyes open. With the eyes closed, the extravert EEG is higher in integrated output than the introvert EEG across the whole measured range, the differences in output being greater in the lower alpha range. Such differences in alpha are not so readily apparent with eyes closed when recording with a gross filter which fails to discriminate among within‐alpha frequencies. However, with eyes open, and given monotonous visual stimulation, even a gross filter shows differential output. Prolonged recording also reveals differences in theta and beta these differences are stronger when the eyes are shut.