We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleThe effects of psilocybin, dextro-amphetamine and placebo on performance of the trail making test.AuthorsDuke RB; Keeler MHPublicationJournal of clinical psychology, 1968, Vol 24, Issue 3, p316ISSN0021-9762Publication typearticleDOI10.1002/1097-4679(196807)24:3<316::aid-jclp2270240310>3.0.co;2-g