A latent variable analysis of working memory capacity, short-term memory capacity, processing speed, and general fluid intelligence

Significant relationships exist between general fluid intelligence and each of the following constructs: short-term memory capacity, working memory capacity (WMC), and processing speed. However, the interrelationship among all four constructs has not been investigated. Multiple measures of each of t...

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Bibliographic Details
Published in:Intelligence (Norwood) 2002-01, Vol.30 (2), p.163-183
Main Authors: Conway, Andrew R.A, Cowan, Nelson, Bunting, Michael F, Therriault, David J, Minkoff, Scott R.B
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cognition. Intelligence
Cognitive ability
Cognitive Processes
Cognitive Speed
Controlled attention
Factor analysis
Fluid Intelligence
Fundamental and applied biological sciences. Psychology
Individual differences
Information processing
Intellectual and cognitive abilities
Intelligence
Latent variable analysis
Latent Variables
Memory
Psychology
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Short Term Memory
Strategy
Structural equation modeling
Working Memory
Young adults
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Summary:Significant relationships exist between general fluid intelligence and each of the following constructs: short-term memory capacity, working memory capacity (WMC), and processing speed. However, the interrelationship among all four constructs has not been investigated. Multiple measures of each of these constructs were obtained from 120 healthy young adults. Structural equation modeling was then performed to determine which construct served as the best predictor of general fluid intelligence. The results suggest that WMC, but not short-term memory capacity or processing speed, is a good predictor of general fluid intelligence in young adults. Possible mechanisms underlying the link between WMC and general fluid intelligence are discussed.
ISSN:0160-2896
1873-7935
DOI:10.1016/S0160-2896(01)00096-4