Three groups of 30 Greek neonates each (an adoptive group from the Metera orphanage, a lower-class group, and a middle-class group) were evaluated at days 1, 5, and 10 after birth using a behavioral scale of 21 items and a neurologic evaluation of 16 items. Behaviors were examined for group differences and group-by-age recovery curves were determined during the first ten days. Significant differences were found in the separate items and items grouped to reflect interactive, motor, and state behavioral dimensions. The adoptive babies at the Metera orphanage generally performed the most poorly. This difference seems not only to reflect intrauterine differences, especially in regard to nutrition but to point to the likelihood of eliciting less than optimal responses from future environments. The middleclass group had the worst scores on physiologic items and were similar to the Metera babies in having initially depressed interactive, motor, and state behavior. Improvement in these areas over ten days suggested that temporary effects of maternal medication caused the poor scores. The recovery curves of the infants pointed to the important effects of such perinatal variables as maternal medication on early neonatal behavior.
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