Journal Alert - INTELLIGENCE
This article presents three studies, two of them longitudinal, which
> investigated the relations between age, processing speed, working memory
> (WM), and fluid intelligence (g(f)) from 4 to 16 years of age.
> Structural equation modeling showed that speed was a powerful covariate
> of age (similar to-.6 to -.7) from 4 to 13 years, declining thereafter
> (to similar to-.2). WM was stably related to speed through the whole
> age-span studied (similar to-.4 to -.5). A large part (59%) of
> age-related changes in gf (83%) from 4 to 7 years and a lower but
> significant part later on, especially in adolescence (similar to 10-20%
> out of similar to 40-50%), were mediated by WM. However, with speed and
> age controlled, WM was almost fully commensurate with g(f)(similar
> to-.9), from about the age of 8-9 years onwards. A series of models
> suggested an ever present efficiency level defined by speed and control
> and a representational level defined by WM and g(f), which are
> increasingly differentiated with development. All processes develop in
> cycles concerted by a dynamic G. Change in each process over time
> originated from within the processes themselves and G, in proportions
> varying with developmental phase. Overall, speed signified
> age-associated changes in processing capabilities, partly expressed in
> WM expansions and g(f) reconstructions. An overarching model is proposed
> integrating differential with ...
Source: Intelligent Insights on Intelligence Theories and Tests (aka IQ's Corner) - Category: Neurologists Source Type: blogs
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