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McCall, John N. – 1971
Individual differences in general intelligence and in 8 different special aptitudes or skills were hypothesized to be independent of family size and birth order indices. Evidence to the contrary, in the form of linear correlations, was predicted to be due to the confounding influence of socio-economic factors. Among the more familiar demographic…
Descriptors: Birth Order, Demography, Family (Sociological Unit), High School Students