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Peer reviewedIngersoll, Evan W.; Thoman, Evelyn B. – Child Development, 1999
Used time-lapse video to record sleep/wake states of preterm infants for three 24-hour periods at 33 and 35 weeks conceptional age. Found that very-low-birthweight preterm infants showed marked stability and developmental change in the organization of sleep/wake states from a very early age, and their states were related to demographic variables…
Descriptors: Age Differences, Birth Weight, Individual Development, Individual Differences
