title: An increase of intelligence in Sudan, 1987-2007.
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.
authors.affiliation: University of Khartoum, Sudan.
authors.forename: Omar
authors.initials: O
authors.lastname: Khaleefa
authors.forename: Afra
authors.initials: A
authors.lastname: Sulman
authors.forename: Richard
authors.initials: R
authors.lastname: Lynn
mesh_terms: D003431:Cross-Cultural Comparison; D003906:Developing Countries; D004522:Educational Status; D005260:Female; D006801:Humans; D007360:Intelligence; D008297:Male; D008875:Middle Aged; D011594:Psychometrics; D012424:Rural Population / Q000706:statistics & numerical data; D012959:Socioeconomic Factors; D013397:Sudan; D014505:Urban Population / Q000706:statistics & numerical data; D014888:Wechsler Scales / Q000706:statistics & numerical data