Chronic Users of LSD: The "Acidheads"
American Journal of Psychiatry September 1, 1968 K. H. Blacker, Reese T. Jones, George C. Stone et al. 85 citations
Twenty-one chronic LSD users showed a shared set of magical-mystical beliefs, nonaggressive attitudes, and heightened sensitivity to certain sensory stimulation, as observed through interviews, cognitive and perceptual tests, and EEG studies. The authors suggest these beliefs and attitudes may have developed as learned consequences of frequent, intense LSD experiences in susceptible individuals.