The effects of dextroamphetamine on kinesthetic figural aftereffects.
The effect of dextroamphetamine, primarily a central stimulant, on kinesthetic figural aftereffects (KFAEs) was examined. The subjects were selected after preliminary testing with the Eysenck Personality Inventory and were classified into three groups: extraverts, ambiverts, and introverts. d-Amphetamine was used at three dose levels and a control group was included for purposes of comparison. The 3 X 4 randomized block design was replicated ten times. KFAEs were measured under two sets of conditions, i.e., before and after the induction experience. The results support the following conclusions: (1) neither personality grouping nor drug treatment during preinduction trials significantly affected KFAE; (2) both types of variables were, however, significantly related to behavior during the postinduction trials; (3) the extraverted subjects showed larger KFAEs than ambiverted and introverted subjects under placebo condition; (4) the extent of KFAE was reduced in extraverted and enhanced in introverted subjects under the influence of the drug; (5) there were significant interactions between the drug treatments and personality variables in effects on KFAE.
D000293:Adolescent; D000328:Adult; D002986:Clinical Trials as Topic; D003913:Dextroamphetamine / Q000494:pharmacology*; D004311:Double-Blind Method; D005120:Extraversion, Psychological; D005260:Female; D006801:Humans; D007699:Kinesthesis / Q000187:drug effects*
D003913:Dextroamphetamine