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Direct linkvan der Sluis, Sophie; Derom, Catherine; Thiery, Evert; Bartels, Meike; Polderman, Tinca J. C.; Verhulst, F. C.; Jacobs, Nele; van Gestel, Sofie; de Geus, Eco J. C.; Dolan, Conor V.; Boomsma, Dorret I.; Posthuma, Danielle – Intelligence, 2008
Sex differences on the Dutch WISC-R were examined in Dutch children (350 boys, 387 girls, age 11-13 years) and Belgian children (370 boys, 391 girls, age 9.5-13 years). Multi-group covariance and means structure analysis was used to establish whether the WISC-R was measurement invariant across sex, and whether sex differences on the level of the…
Descriptors: Foreign Countries, Gender Differences, Preadolescents, Early Adolescents
Dolan, Conor V.; Roorda, Willemijn; Wicherts, Jelte M. – Intelligence, 2004
Spearman's hypothesis states that the differences between Blacks and Whites in psychometric IQ are attributable to a fundamental difference in general intelligence ("g"). To investigate this hypothesis, Jensen devised the method of correlated vectors. This method involves calculating the correlation between the factor loadings of the…
Descriptors: Psychometrics, Intelligence Quotient, Intelligence Differences, Hypothesis Testing
