Relationship between the brainstem auditory evoked response and extraversion, impulsivity, and sociability

Author(s): Gilliland, K.

Journal/Book: J Res Personal. 1998; 32: 525 B St, Ste 1900, San Diego, CA 92101-4495. Academic Press Inc Jnl-Comp Subscriptions. 314-330.

Abstract: It has been suggested that the trait of extraversion is associated with physiological arousal (Eysenck, 1967). Both psychophysiological and behavioral studies have generally supported this statement (Eysenck & Eysenck, 1985), However, recent research has suggested that the trait of impulsivity is the trait most closely linked to the physiological arousal mechanisms believed to underlie extraversion (Revelle, Humphreys, Simon, & Gilliland, 1980). This study utilized brainstem auditory evoked responses (ABRs) to investigate which trait (extraversion, impulsivity, sociability) is most closely related to hypothesized ascending reticular activating system-regulated arousal processes. The results indicated that the full scale of extraversion was related to ABR wave V activity, r = .27, p < .025, with extraverts exhibiting slower ABR latencies compared to introverts. Analyses of the subscales indicated that sociability (r = .27, p < .025), rather than impulsivity (r = .05, p < .70), contributed more to this effect.

Note: Article Swickert RJ, Coll Charleston, Dept Psychol, 58 Coming, Charleston,SC 29424 USA

Keyword(s): CAFFEINE-INDUCED AROUSAL; VISUAL-SEARCH TASK; INDIVIDUAL-DIFFERENCES; INTROVERSION-EXTROVERSION; VERBAL PERFORMANCE; COCHLEAR NUCLEUS; PERSONALITY; TIME; PSYCHOPHYSIOLOGY; POTENTIALS

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