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Origins of Differential Psychology
Distribution and Extent of Individual Differences
17 other sections not shown
ability abnormal achievement adult Amer aptitude average behavior development boys Cattell cent cephalic index characteristics child correlations cultural curve defectives differential psychology distribution educational effects emotional environment etiology evidence example experience experimental factor analysis feebleminded foster fraternal twins functions genes genet genius gifted girls hereditary heredity historiometry human identical twins illustrated indicate individual differences individual's influence intellectual intelligence test intelligence test scores interest investigations IQ's learning likewise male mean measures ment mental deficiency Monogr Negro normal observed obtained occupational parents personality physical physique population practice prenatal preschool problems Psychol psychological tests recessive gene regarding relationship relatively retest sample scale schizophrenics school children selective sex differences siblings significant similar social social class socioeconomic socioeconomic level somatotype specific Stanford-Binet statistical subjects superior survey techniques tend test performance tion traits types Univer variability verbal women