2022-01-102022-01-1019752187537https://hdl.handle.net/10657/8462The experimenter employed an experimental group of 14 practitioners of Transcendental Meditation (TM) and a control group of 14 persons solicited from introductory lectures on TM to examine the effects of regular practice of a meditation technique on three tasks involving geometric illusions and one task involving secondary cues to depth. The meditators were asked to meditate and the non-meditators were asked to relax for twenty minutes. After this period they were presented with a counterbalanced sequence of the Muller-Lyer, Ponzo, and Poggendorff illusions and a depth cue task involving seven figures containing differing amounts of depth information. There were no significant differences between the groups on any one task, but, collapsing across tasks, 6 the experimental group showed significantly less error than the control group. (p< .05). On the illusion tasks there were significant differences (p< .00003) between the two directions of change of the variable part of each stimulus. On the Muller-Lyer illusion there was a significant difference (p< .01) between the first and second presentations of the task. The experimenter discussed the possible effect of dissimilar drug histories of the two groups on the results.application/pdfenThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. §107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.Thesisreformatted digital