Abstract
Results from the standardization of the Wechsler Adult Intelligence Scale-4 (WAIS-IV) in South Korea show that when using British norms, average IQs are higher in Korea than in Britain among younger age groups, decline with age, and are lower than those in Britain among older age groups. These age differences are attributed to a strong Flynn effect in South Korea with IQs increasing at a rate of approximately 8.4 IQ points a decade from early 1940s to late 1980s birth cohorts. The increases were smallest for the Verbal Comprehension IQ and largest for the Processing Speed IQ. Key Words: WAIS-IV; Intelligence, Flynn effect, South Korea, UK
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