The Effects of Marijuana on Certain Psychomotor, Behavioral and Physiological Functions of Man
D'Amato, Valerie Mary
Ripstra, Constance Carolyn
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The effects of marijuana on various psychomotor, physiological, and intellectual functions of man were studied. The subjects, 20 male medical students, were divided into two treatment groups, one group receiving marijuana, the other group receiving placebo. A series of tests designed to measure psychomotor, Physiological, and intellectual functions were run prior to and following administration of the drug or placebo treatments. Results (within group analyzed with Wllcoxan Sign-Ranks Test, between group analyzed with Mann-Whitney U) varied with the specific measures: cognitive functioning was slightly impaired, psychomotor functioning improved slightly, salivary now decreased, pulse rate increased, blood pressure and pupil size remained the same. Subjective effects were ambiguous in that there existed a discrepancy between the subjects ratings of the drug's effect ("high") and positive responses to questions regarding subjective changes.