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Two groups of infants, 2 and 9 months of age, were monitored for one night by time-lapse videotape recording in the natural setting of their homes. Developmental changes in sleep-wake state proportions, ease of falling asleep, nighttime waking patterns, maternal interventions, and sleeping through the night were observed. A suggestion of differential parental handling of male infants was noted. Further research to clarify some of these issues is indicated.
Thomas F. Anders (Fri,) studied this question.