During the last decade increasing attention has been paid to the effects of the perceptual variables in the environment of an organism upon the behavior of that organism. The importance of deprivation of exteroceptive stimulation is shown by the study of Bexton, Heron, and Scott (1954). Human Ss were placed in an isolated cubicle and wore equipment restricting visual and tactual stimulation. The Ss reactions included hallucinations, deterioration of intellectual abilities, and inability to tolerate the treatment for extended periods
