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Wicherts, Jelte M.; Dolan, Conor V.; van der Maas, Han L. J. – Intelligence, 2010
On the basis of several reviews of the literature, Lynn [Lynn, R., (2006). Race differences in intelligence: An evolutionary analysis. Augusta, GA: Washington Summit Publishers.] and Lynn and Vanhanen [Lynn, R., & Vanhanen, T., (2006). IQ and global inequality. Augusta, GA: Washington Summit Publishers.] concluded that the average IQ of the…
Descriptors: International Studies, Intelligence Quotient, Foreign Countries, Psychometrics
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Roivainen, Eka – Intelligence, 2010
For this study, European WAIS III performance subtest norms were compared to the original US norms. When European WAIS III raw scores were scored using US norms, the resulting perceptual organization index (POI) means were significantly higher than the processing speed index (PSI) means. The POI/PSI difference is roughly 5-10 points for the German…
Descriptors: Intelligence Tests, Comparative Analysis, Foreign Countries, Test Norms
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Shelton, Jill T.; Elliott, Emily M.; Hill, B. D.; Calamia, Matthew R.; Gouvier, Drew – Intelligence, 2009
The working memory (WM) construct is conceptualized similarly across domains of psychology, yet the methods used to measure WM function vary widely. The present study examined the relationship between WM measures used in the laboratory and those used in applied settings. A large sample of undergraduates completed three laboratory-based WM measures…
Descriptors: Short Term Memory, Intelligence, Intelligence Tests, Undergraduate Students
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Silverman, Wayne; Miezejeski, Charles; Ryan, Robert; Zigman, Warren; Krinsky-McHale, Sharon; Urv, Tiina – Intelligence, 2010
Stanford-Binet and Wechsler Adult Intelligence Scale (WAIS) IQs were compared for a group of 74 adults with intellectual disability (ID). In every case, WAIS Full Scale IQ was higher than the Stanford-Binet Composite IQ, with a mean difference of 16.7 points. These differences did not appear to be due to the lower minimum possible score for the…
Descriptors: Mental Retardation, Dementia, Intelligence Quotient, Measures (Individuals)
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Spitz, Herman H. – Intelligence, 1988
From published data on the Wechsler subtest performance of mild and borderline mentally retarded persons, 4,304 protocols from 4,004 individuals were collated and their subtest patterns on other Wechsler instruments were compared. Results indicate that mildly retarded groups tend to score lower on subtests that better measure general intelligence.…
Descriptors: Comparative Analysis, Heredity, Intelligence Tests, Mild Mental Retardation