Extraversion and Duration of the Archimedes Spiral Aftereffect

Abstract
Two studies are reported testing the relationship between reported duration of the Archimedes Spiral Aftereffect (SAE) and the interaction between the personality variables of neuroticism and extraversion as measured by Eysenck's MPI. In both studies SAE was related to an interaction between neuroticism and extraversion, but in opposite directions in each. Because of the different attitudes toward Ss' task in the two studies, it was concluded that the personality variables interacted with each other and with a third variable, that of “task-motivation.”