Working memory capacity mediates the relationship between removal and fluid intelligence

Krishneil A. Singh, Gilles E. Gignac, Christopher R. Brydges, Ullrich K.H. Ecker

Research output: Contribution to journalArticle

Abstract

A process of active, item-wise removal of information from working memory (WM) has been proposed as the core component process of WM updating. Consequently, we investigated the associations between removal efficiency, WM capacity, and fluid intelligence (gF) in a series of three individual-differences studies via confirmatory factor analysis. In each study, participants completed a novel WM updating task battery designed to measure removal efficiency. In Study 1, participants additionally completed a WM capacity task battery. In Study 2, participants completed a battery of well-established measures of gF in addition to the updating battery. In Study 3, participants completed the updating, WM capacity, and gF task batteries. The results suggested that removal efficiency was related to both WM capacity and gF. Furthermore, based on a mediation analysis, the relationship between removal efficiency and gF was found to be entirely indirect via removal's influence on WM capacity. The results were interpreted to suggest that removal ability may contribute to performance in reasoning tasks effectively through increasing WM capacity, presumably through reducing interference from distracting information.

LanguageEnglish
Pages18-36
Number of pages19
JournalJournal of Memory and Language
Volume101
DOIs
StatePublished - 1 Aug 2018

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Intelligence
Short-Term Memory
intelligence
Data storage equipment
Fluids
Efficiency
efficiency
Working Memory Capacity
Aptitude
Battery
Factor analysis
Individuality
Statistical Factor Analysis
mediation
factor analysis
interference
Working Memory
ability

Cite this

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title = "Working memory capacity mediates the relationship between removal and fluid intelligence",
abstract = "A process of active, item-wise removal of information from working memory (WM) has been proposed as the core component process of WM updating. Consequently, we investigated the associations between removal efficiency, WM capacity, and fluid intelligence (gF) in a series of three individual-differences studies via confirmatory factor analysis. In each study, participants completed a novel WM updating task battery designed to measure removal efficiency. In Study 1, participants additionally completed a WM capacity task battery. In Study 2, participants completed a battery of well-established measures of gF in addition to the updating battery. In Study 3, participants completed the updating, WM capacity, and gF task batteries. The results suggested that removal efficiency was related to both WM capacity and gF. Furthermore, based on a mediation analysis, the relationship between removal efficiency and gF was found to be entirely indirect via removal's influence on WM capacity. The results were interpreted to suggest that removal ability may contribute to performance in reasoning tasks effectively through increasing WM capacity, presumably through reducing interference from distracting information.",
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Working memory capacity mediates the relationship between removal and fluid intelligence. / Singh, Krishneil A.; Gignac, Gilles E.; Brydges, Christopher R.; Ecker, Ullrich K.H.

In: Journal of Memory and Language, Vol. 101, 01.08.2018, p. 18-36.

Research output: Contribution to journalArticle

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