This paper reports on a 14-year follow-up study of two developmentally retarded Japanese children, a brother and sister, who had been kept shut up in a small shack before being rescued (at ages 5 and 6 respectively). Following birth they consistently suffered malnutrition, maternal deprivation, social isolation from adults, language deprivation,…

Compared longitudinally were effects of biological risk and social influences on the physical, psychomotoric, cognitive-linguistic, disability, adjustment, and academic domains of 1,008 children at eight stages between 3 and 6 1/2 years of age. Over 20 tests such as physical measurements and the Preschool Attainment Record (PAR) were used. Some of…