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An increase of intelligence in Sudan, 1987-2007
Omar Khaleefa1, Afra Sulman, Richard Lynn
1University of Khartoum, Sudan.
Journal of Biosocial Science
|November 18, 2008
Abstract:
Results are reported for mean IQs on the WAIS-R in Sudan in 1987 and 2007. There was a gain of 4.05 Full Scale IQ points over the 20-year period, representing a gain of 2.05 IQ points a decade. The Verbal IQ showed a loss of 1.65 IQ points, while the Performance IQ showed a gain of 7.2 IQ points. These results are broadly consistent with those in economically developed countries in showing that mean IQ on the WAIS-R has increased in Sudan, and the Performance IQ has increased more than the Verbal IQ.
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