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Direct linkFlynn, James R. – Intelligence, 2010
The ranking of Wechsler subtests in terms of their "g" loadings is equivalent to ranking them in terms of the cognitive complexity of the tasks measured. Lower performing groups do not always fall behind higher performing groups the more complex the task. But that is the general rule, no matter whether the cause of the lower performance…
Descriptors: Intelligence Quotient, Genetics, Intelligence Tests, Race
Peer reviewedLoehlin, John C.; And Others – Intelligence, 1994
Correlations on subscales of Wechsler intelligence quotient tests and the Revised Beta Examination were obtained for biologically related and unrelated individuals in 181 adoptive families in the Texas Adoption Project. Generally higher correlations for biologically related individuals support the importance of genetic influence in intellectual…
Descriptors: Adopted Children, Adoption, Cognitive Ability, Correlation
