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Peer reviewedDeary, Ian J.; And Others – Intelligence, 1996
The differentiation hypothesis suggests that the degree to which general intelligence ("g") pervades performance on mental tests is greater at lower ability levels. Analysis of data from Differential Aptitude Test results for over 10,500 Irish school children ages 14 to 17 years supports the differentiation hypothesis. (SLD)
Descriptors: Ability, Aptitude Tests, Foreign Countries, Intelligence
