Alcoholic and nonalcoholic introversive and extroversive Ss were placed in a GSR conditioning situation. Significant differences in conditionability were not found between alcoholics and the nonalcoholic group with regard to the intro-extroversion dimension. The results were seen as confirming aspects of Eysenck's (1957) theory of personality. (PsycINFO Database Record (c) 2006 APA, all rights reserved)