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The Meaning of Environment
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ability alpha rhythm alpha waves Amer average benzedrine Binet birth boys brain cerebral Cerebral Cortex cerebral hemispheres changes chil child classes College Columbia University compared control group correlation correlation ratios delinquency deviates differences differential dren effect electroencephalogram environment environmental errors evidence experimental fact factors fathers feebleminded foster homes fraternal twins frequency frontal lobes functions gence Genet gifted children girls Goodenough grade growth heredity identical twins individual influence intellectual intelligence quotients intelligence tests intelligent behavior investigations Iowa IQ's Jour lesions mean IQ measures of intelligence ment mental age mental deficiency months nature-nurture Negro children neopallium nursery-school orphanage parents percent personality points population preschool present problem Psychiat Psychol psychological range relation reported Research sample scale scores selected significant social status socio-economic status Stanford Stanford-Binet statistical subjects superior Terman tion traits University University of Iowa variables Wellman Yearbook York