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Direct linkFacon, Bruno; Magis, David; Nuchadee, Marie-Laure; De Boeck, Paul – Intelligence, 2011
Standardized tests are used widely in comparative studies of clinical populations, either as dependent or control variables. Yet, one cannot always be sure that the test items measure the same constructs in the groups under study. In the present work, 460 participants with intellectual disability of undifferentiated etiology and 488 typical…
Descriptors: Intelligence Tests, Standardized Tests, Mental Retardation, Children
Spinks, Ruth; Arndt, Stephan; Caspers, Kristin; Yucuis, Rebecca; McKirgan, L. William; Pfalzgraf, Christopher; Waterman, Elijah – Intelligence, 2007
The relationship between measures of IQ and standardized school achievement tests is well established at around r~0.5 when the two are measured in close proximity. The current paper examined the stability of this correlation when comparing elementary school achievement (grades 3-8) and midlife IQ. Iowa Adoption Study participants who had…
Descriptors: Correlation, Employment Level, Income, Academic Achievement
Peer reviewedLim, Tock Keng – Intelligence, 1988
Heim's AH4 Test of General Intelligence, Raven's Advanced Progressive Matrices, and two Piagetian formal operations tests (Shayer's Science Reasoning Tasks and Arlin's Test of Formal Reasoning) were administered to 459 15-year-olds attending Secondary three (grade nine) in Singapore. A hierarchical factor structure was found underlying all of…
Descriptors: Factor Structure, Formal Operations, Grade 9, High School Freshmen
