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Perceptual distortions and hallucinations reported during the course of sleep deprivation
H Babkoff1, H C Sing, D R Thorne
1Department of Psychology, Bar-Ilan University, Ramat-Gan, Israel.
Perceptual and Motor Skills
|June 1, 1989
Abstract:
Subjects worked 30 to 45 min. of each hour for either 48 (n = 2) or 72 hr. (n = 8) without sleep. The frequency of reported visual task-related perceptual distortions and hallucinations showed both a linear increasing component and a strong circadian component. Perceptual distortions were most frequent in the late night-early morning hours (0400) and least frequent in the late afternoon-early evening hours (1600-2000).