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Discuss psychological studies into sleep deprivation The first documented study of sleep deprivation was conducted by Patrick & Gilbert in 1898. They deprived three healthy young men of sleep for 90 hours. The men reported a gradually increasing desire to sleep and from the second night onwards two of them experienced perceptual disorders. When they were allowed to sleep all for them slept for longer than they usually did and the psychological disturbances they experienced disappeared. There are problems with this study in that in 1898, equipment was not available to measure signals from the brain and demand characteristics may have played a part because the participants may have expected to experience perceptual disorders. In 1959, Peter Tripp, a New York DJ, staged a charity 'wakeathon' in which he did not sleep for eight days. Towards the end of his feat, Tripp showed some disturbing symptoms such as hallucinations and delusions. The delusions...

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