It's interesting for what it doesn't say as much as for what it does
say.
Zubek and MacNeill (1966, 1967) and Zubek and Wilgosh (1963) have
studied and compared the effects of recumbency and more severe
immobilization with ambulatory controls and SD groups confined for a
period of one week. The recumbent and immobilized subjects in these
experiments were provided with perceptual and social stimulation. The
recumbent groups were confined to a bed, but their movements not
otherwise restricted; the immobilized group was confined to a
foam-rubber-lined "coffin"-like box with straps and a head retainer
which severely restricted their movements. All 22 subjects immobilized,
but not perceptually restricted, were able to endure the week of
confinement. Similarly, all of the recumbent controls in the Zubek et
al. (1962) experiment endured a week of confinement. In contrast, only
about two thirds of the subjects in SD or PD [perceptual deprivation]
(Zubek et al., 1961, 1962) were able to endure a week's confinement. In
terms of the gross endurance data it would seem that confinement or
immobiliztion play no role in SD stress. However, the data from the
Myer's (1962) Post-Isolation-Questionaire, used in the Zubek and
MacNeill (1967) study, reveals that some of the subjective SD or PD
effects are due solely to perceptual restriction, others are due to a
combination of perceptual restriction and confinement, while some are
produced by confinement alone. The one-week PD group was significantly
higher than both confined-recumbent and ambulatory control groups on
the following scales: reported visual sensations, loss of contact with
reality, changes in body image, speech difficulties, reminiscence and
vivid memories, sexual preoccupation, temporal disorientation, and
positive attitude toward experimenters.
(end of quoted stuff)
Presumably there was also a study of immobilization AND sensory
deprivation whose results were NOT published.
"I was one of the first heavy smokers to undergo the seven-day period and it was surprising how little the addiction affected me. Smoking in the dark simply did not appeal" recollection from one of Zubek's associates.
Here's a clearer image of the immobilization box.
"In medieval times European queens wore white to express the deepest sorrow. In ancient Egypt white represented the lifeless desert while black was the colour of life. White torture is when you isolate a prisoner dressed in white, in a white, soundproofed, constantly lit room, isolated from all stimuli, even the sounds that we normally refer to as silence. In the white absence the prisoner is broken down, thought and focus hindered, you hallucinate. Encompassed in the white you lose your personality and the history of your personality. Japanese brides wear white to represent the death of their former family when they join their new one."