Some psychological correlates of long-term heavy cannabis users.
The British journal of psychiatry : the journal of mental science May 1978 S S Menhiratta, N N Wig, S K Verma
Fifty persons who had all been heavy cannabis users for a long time were given psychological tests measuring psychomotor, perceptual and other variables. Half of these persons were "Charas" smokers, half "Bhang" drinkers. The duration of cannabis use was 4--10 years, with an average daily dose of 150 mg tetrahydrocannabinol. A matched control group of twenty-five persons were given the same...