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Direct linkMatzke, Dora; Dolan, Conor V.; Molenaar, Dylan – Intelligence, 2010
In higher order factor models, general intelligence (g) is often found to correlate perfectly with lower-order common factors, suggesting that g and some well-defined cognitive ability, such as working memory, may be identical. However, the results of studies that addressed the equivalence of g and lower-order factors are inconsistent. We suggest…
Descriptors: Intelligence, Statistical Analysis, Correlation, Effect Size
Johnson, Wendy; te Nijenhuis, Jan; Bouchard, Thomas J., Jr. – Intelligence, 2008
In a recent paper, Johnson, Bouchard, Krueger, McGue, and Gottesman (2004) addressed a long-standing debate in psychology by demonstrating that the g factors derived from three test batteries administered to a single group of individuals were completely correlated. This finding provided evidence for the existence of a unitary higher-level general…
Descriptors: Intelligence, Correlation, Tests, Perception
Ratcliff, Roger; Schmiedek, Florian; McKoon, Gail – Intelligence, 2008
The worst performance rule for cognitive tasks [Coyle, T.R. (2003). IQ, the worst performance rule, and Spearman's law: A reanalysis and extension. "Intelligence," 31, 567-587] in which reaction time is measured is the result that IQ scores correlate better with longer (i.e., 0.7 and 0.9 quantile) reaction times than shorter (i.e., 0.1 and 0.3…
Descriptors: Reaction Time, Intelligence Quotient, Correlation, Models
Gelade, Garry A. – Intelligence, 2008
This paper examines the distribution of national IQ in geographical space. When the heritability of IQ and its dependence on eco-social factors are considered from a global perspective, they suggest that the IQs of neighboring countries should be similar. Using previously published IQ data for 113 nations (Lynn, R., & Vanhanen, T., (2006). IQ and…
Descriptors: Global Approach, Intelligence Quotient, Geographic Location, Socioeconomic Influences
Peer reviewedJensen, Arthur R.; Weng, Li-Jen – Intelligence, 1994
The stability of psychometric "g," the general factor of intelligence, is investigated in simulated correlation matrices and in typical empirical data from a large battery of mental tests. "G" is robust and almost invariant across methods of analysis. A reasonable strategy for estimating "g" is suggested. (SLD)
Descriptors: Correlation, Estimation (Mathematics), Factor Analysis, Intelligence
Peer reviewedJensen, Arthur R. – Intelligence, 1985
Borkowski and Krause (1983) concluded that the locus of black-white intelligence differences lies in metaprocesses not elementary cognitive processes. However, some variables were difference scores with unacceptably low reliability. Magnitude comparisons of racial differences give a different picture of results; comparable differences in measures…
Descriptors: Black Students, Cognitive Measurement, Cognitive Processes, Correlation
