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The American Journal of Psychiatry, VOL. 125, No. 3

Articles | September 01, 1968

Experimental Studies of Marihuana

LINCOLN D. CLARK; EDWIN N. NAKASHIMA

Am J Psychiatry 1968;125:379-384.

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Professor of psychiatry and director, behavioral sciences laboratory of the College of Medicine, University of Utah, Salt Lake City, Utah 84112

Research associate, behavioral sciences laboratory of the College of Medicine, University of Utah, Salt Lake City, Utah 84112

1968-69, American Psychiatric Association

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Abstract

The study reported here, designed to extend knowledge of the behavioral toxicity of marihuana, illustrates some of the problems involved in measuring the effects of such drugs. A number of performance tests proved insensitive to marihuana in the doses used. Effects on complex reaction time and on digit code memory tasks were impaired, but there were marked individual differences.

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