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THE MEASUREMENT OF INTELLIGENCE
BRIGHTNESS AND DULLNESS
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adult anatomical age association attention average better Binet tests bones boys brain weight capacity cells cent cerebral cortex chil chronological age classes considerable cortex curve depends determine dren Educational Psychology eighth grade environment epiphyses exceptionally bright exercises fact factors faculties feeble feeble-minded children Francis Galton functions gence girls given growth heredity idiots imbeciles important incisors increase indicate individual instincts intelligence quotient interest investigation Journal of Psychology Kallikak Family large number means memory ment mental ability mental age mental processes mental tests mental traits mentally retarded merely method mind morons Murray Island normal children number of children object obtained ossification parents pedagogical retardation percentage permanent teeth physical defects physiological premolars problem pupils pyramidal cells pyramidal layer reason relation scale school children sense sensory discrimination simply Spearman success superior teacher teeth ten-year-old term theory tion ulna