Relative effects of sleep disturbance and persistent endogenous rhythm after experimental phase shift
The physiological changes after time shifts have been reported by Elliott, Mills, Minors and Waterhouse (1972). In that paper the authors concluded that “the course of adaptation to time zone shift is irregular and varies widely between individuals”. The present paper presents the psychological findings which were obtained concomitantly with those physiological changes and also some results from more recent experiments. Variability in psychological measurements may be expected to be even greater, particularly since the tests were self-administered.
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