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Direct linkSundet, Jon Martin; Eriksen, Willy; Borren, Ingrid; Tambs, Kristian – Intelligence, 2010
The aim of the study was to investigate the relationship between the Flynn effect and the effects of age differences between siblings on the intelligence difference between them. In Norway, the secular trends in intelligence-test score means vary both in magnitude and direction. We identified three periods: one period where the mean intelligence…
Descriptors: Intelligence, Siblings, Intelligence Quotient, Birth Order
