Investigating the Relationship Between Extraversion and the Auditory Brainstem Response: A Cross-validation Approach
Author(s): Rhonda Swickert, Luz-Eugenia Cox-Fuenzalida, Kirby Gilliland
Abstract: Faster wave V latency has been found for introverts, as compared to extraverts, in studies that typically compared the ABR (auditory brainstem response) waveforms of relatively small samples of participants in the upper and lower ranges of the IE (Introversion - Extraversion) distribution. The present study confirms and extends these findings through across-validation approach. The IE scores of participants in the upper and lower ranges of ABR wave V latency were compared. Those who had significantly faster ABR wave V latency also had significantly lower IE scores (i.e., were more introverted) as compared to those who had slower ABR wave V latency. The correlation between wave V latency and IE score in a larger sample of participants (N = 87) was also significant (r = .22,p = .03). These results confirmed earlier findings regarding the relationship between ABR latency and IE, and are supportive of Eysenck's (1967) arousal theory of IE.
Pages: 292-298
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