The threshold of transmarginal inhibition (TTI), indexed by the duration of the visual after-image under massed trial conditions, was examined under three treatment conditions—caffeine, placebo and Sodium Amytal—with a sample of 16 Ss, selected on the basis of extraversion (E) and neuroticism (N) scores on Eysenck and Eysenck's (1964) Personality Inventory (EPI). N was found to be positively related to growth of transmarginal inhibition. © 1972, Pergamon Press. All rights reserved.
White, K. D., & Mangan, G. L. (1972). Strength of the nervous system as a function of personality type and level of arousal. Behaviour Research and Therapy, 10(2), 139–146. https://doi.org/10.1016/S0005-7967(72)80007-X