Sensory Deprivation.

The data in the following report were collected on four subjects S-3, S-4, S-5, and S-6. Each S was subjected to 72 hours of sensory deprivation, with the exception of S-3. A. The learning of the auditory adjective lists showed a fair amount of improvement some of which appears to be permanent. Fifteen-item lists were employed. B. Instructions were given with the purpose of minimizing rehearsal of the adjective lists during confinement. As the savings scores and reports of the subjects show, these instructions were effective. C. Decoy material for Ss to work on during confinement has been introduced. These data are not yet ready for presentation and will not appear until control data are available. D. Data for the Body Sway Test of Suggestibility are presented. A new project under the area of Suggestion is introduced. E. Data for the concept formation problems are presented. Conclusions about these data await control data. F. The nature and description of hallucinations are included. Two Ss report visual hallucinations, but there are no reports of auditory hallucinations. G. One subject S-3 was unable to remain in confinement. A discussion of his interview is included.