Followup of institutionalized infants' concept formation ability at age 12.
D000367:Age Factors; D002648:Child; D002657:Child Development; D002674:Child, Institutionalized; D002675:Child, Preschool; D003210:Concept Formation; D003423:Critical Period, Psychological; D003467:Cultural Deprivation; D006801:Humans; D007223:Infant; D007224:Infant Care; D007361:Intelligence Tests; D008426:Maternal Deprivation; D012392:Rorschach Test