title: Psychiatric and behavioral observations of casual and heavy marijuana users in a controlled research setting.
mesh_terms: D000328:Adult; D001519:Behavior / Q000187:drug effects*; D002188:Cannabis; D003216:Conditioning, Operant / Q000187:drug effects; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000139:chemically induced* / Q000209:etiology; D011569:Psychiatric Status Rating Scales; D012055:Reinforcement Schedule; D019966:Substance-Related Disorders / Q000150:complications / Q000503:physiopathology; D013997:Time Factors