Reaction time correlations with intelligence test scores obtained under either timed or untimed conditions

The structure of the relationship between attention and intelligence

“…There is evidence from other studies, which demonstrates that the size of correlations is rather independent of the mode of test administration. There were more or less the same correlations for speeded and unspeeded intelligence tests (Schweizer, 1996;Vernon & Kantor, 1986;Vernon, Nador, & Kantor, 1985).…”

Can fast and slow intelligence be differentiated?

“…The elements one has to operate with may have vanished by the time a slow processing mind is done, so that the cognitive task remains unresolved or needs a whole new trial. Indirect empirical support for the theory is provided, among others, by Vernon, Nador, and Kantor (1985) and Vernon and Kantor (1986). The implication is that a higher speed of information processing provides the brain with a larger working memory capacity.…”

Understandingg in terms of information processing

“…RT shows larger correlations with non-speeded than with speeded tests. When a speed factor, independent of g, is extracted from a factor analysis of a collection of speeded and non-speeded tests, RT has zero correlation with the speed factor; but it is correlated, usually exclusively, with the g factor (Jensen, 1987d;Vernon and Kantor, 1986;Vernon, Nador, and Kantor, 1985). The degree to which a variety of psychometric tests, such as the subtests of the WAIS, are correlated with RT on any given ECT is directly related to the various tests' g loadings (Smith and Stanley, 1987).…”