title: Contrast effect on subjective experience in drug experiments.
mesh_terms: D000704:Analysis of Variance; D002986:Clinical Trials as Topic; D006801:Humans; D008722:Methods; D010555:Personality Inventory; D010919:Placebos; D011594:Psychometrics; D019966:Substance-Related Disorders / Q000188:drug therapy*
chemical_list: D010919:Placebos