Cannabis and cognitive functions: a prospective study

Drug Alcohol Depend. 1988 May;21(2):147-52. doi: 10.1016/0376-8716(88)90061-0.


Psychological tests measuring intelligence, memory and other cognitive functions were given to 26 heavy cannabis users (mean duration of cannabis use 6.76 years; average daily intake 150 mg THC). Compared with a control group, the cannabis users were found to react slowly in perceptuo-motor tasks, but not to differ in intelligence or memory tests. The users suffered disability in personal, social and vocational areas and indicated higher psychoticism and neuroticism scores.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Humans
  • India
  • Intelligence / drug effects*
  • Marijuana Abuse / psychology*
  • Memory / drug effects*
  • Mental Recall / drug effects*
  • Neuropsychological Tests
  • Psychometrics
  • Substance-Related Disorders / psychology*