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Direct linkDykiert, Dominika; Gale, Catharine R.; Deary, Ian J. – Intelligence, 2009
This study investigated the possibility that apparent sex differences in IQ are at least partly created by the degree of sample restriction from the baseline population. We used a nationally representative sample, the 1970 British Cohort Study. Sample sizes varied from 6518 to 11,389 between data-collection sweeps. Principal components analysis of…
Descriptors: Psychological Testing, Cognitive Tests, Intelligence Quotient, Factor Analysis
