Recent research on the physiology of REM sleep has supported the hypothesis that it serves processes of psychologic adaptation. This study examines the relationship between physiologic parameters of REM sleep and evidence in analytic material of the need for adaptation. Significant correlations were found between defensive strain before sleep and REM latency, and between change in defensive strain from evening to morning and total REM time.
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Greenbérg et al. (1975) studied this question.
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