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1It was hypothesized that the sleep-dream cycle should have a waking state counterpart characterized by a waxing and waning of oral activity in cycles similar in duration to those seen during sleep.
2An a priori scoring system of oral activity was constructed. Ten research subjects were put into a relaxed and semi-isolated observational situation. Their oral activities were recorded and scored in consecutive 20-minute periods for durations of observation ranging from 52/3 to 8 hours.