J Nerv Ment Dis. 1975 Jul; 161(1): 26-31.

Marijuana-produced impairments in coordination. Experienced and nonexperienced subjects.

Milstein SL, MacCannell K, Karr G, Clark S.

The effects of marijuana and a placebo on perceptual-motor coordination, motor ability, and visual perception were compared in cannabis-experienced and naÃ¯ve subjects. Impairments in coordination were observed in both groups. However, the impairment was greater in the experienced than in the naÃ¯ve group.