Abstract
“We would predict that any test which has been shown to differentiate reliably and validly between introverts and extraverts will, when applied to subjects who have been administered an excitant (or depressant) drug, show shifts in scores in the direction characteristic of greater introversion (or extraversion).” “… the effects of depressant drugs are similar to those of brain damage as far as objective psychological tests are concerned. Conversely, the effects of excitant drugs are opposite to those of brain damage.” These predictions by Eysenck (7) were tested using measures of immediate memory and expressive movement which had previously been validated against extraversion and brain damage. The measures discussed are derived from the Figure Reconstruction Test (immediate recall version).
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