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Zajonc, Robert B.; Mullally, Patricia R. – American Psychologist, 1997
Introduces the confluence model as a theory specifying the process by which the intellectual environment modifies intellectual development. Using this model, explores the contradiction between prediction of secular trends in test scores by trends in aggregate birth order and the lack of prediction of individual test scores by birth order using…
Descriptors: Birth Order, Intellectual Development, Intelligence Tests, Models