On chronic effects of different drugs on the higher nervous activity in man. Placebo.
D000293:Adolescent; D000328:Adult; D001244:Association; D003213:Conditioning, Psychological; D005260:Female; D006613:Higher Nervous Activity / Q000187:drug effects*; D006801:Humans; D008297:Male; D010919:Placebos; D013997:Time Factors; D014705:Verbal Behavior / Q000187:drug effects
D010919:Placebos