ERIC Number: EJ724232
Record Type: Journal
Publication Date: 2005
Memory Span and General Intelligence: A Latent-Variable Approach
Colom, Roberto; Abad, Francisco J.; Rebollo, Irene; Chun Shih, Pei
Intelligence, v33 n6 p623-642 Nov-Dec 2005
There are several studies showing that working memory and intelligence are strongly related. However, working memory tasks require simultaneous processing and storage, so the causes of their relationship with intelligence are currently a matter of discussion. The present study examined the simultaneous relationships among short-term memory (STM), working memory (WM), and general intelligence ("g"). Two hundred and eight participants performed six verbal, quantitative, and spatial STM tasks, six verbal, quantitative, and spatial WM tasks, and eight tests measuring fluid, crystallized, spatial, and quantitative intelligence. Especial care is taken to avoid misrepresenting the relations among the constructs being studied because of specific task variance. Structural equation modelling (SEM) results revealed that (a) WM and g are (almost) isomorphic constructs, (b) the isomorphism vanishes when the storage component of WM is partialed out, and (c) STM and WM (with its storage component partialed out) predict "g."
Descriptors: Intelligence, Memory, Structural Equation Models, Cognitive Ability, Meta Analysis, Intelligence Tests, Task Analysis, Cognitive Processes
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Publication Type: Journal Articles; Reports - Evaluative
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