Cited by 90Cognitive Abilities and TestingAging and Gerontology ResearchNeural and Behavioral Psychology Studies

The roles of working memory updating and processing speed in mediating age-related differences in fluid intelligence

Chen, Tianyong, Li, Deming·2007·Aging Neuropsychology and Cognition

Abstract

This study was conducted to investigate the relative roles of working memory updating (updating) and processing speed in mediating age-related differences in fluid intelligence. A sample of 142 normal adults between 18 and 85 years of age performed a set of updating, processing speed, and fluid intelligence tasks. Hierarchical regression analyses indicated that the proportion of unique age-related variance in updating measures was related to the complexity of speed measures. There was a larger proportion of unique age-related variance in updating measures after controlling for the variance in simpler speed measures. Moreover, structural equation modeling showed that updating mediated almost all the age-related effects on fluid intelligence. These results suggest that updating, but not speed, is the critical mediator between age and fluid intelligence. In addition, the speed mediation of age-related differences in fluid intelligence as indicated by previous studies is at least partially derived from the executive component of speed measures.

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Crossref · 10.1080/13825580600987660

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Authors
Chen, T., & Li, D.
Affiliations
Chinese Academy of Sciences (CN)
Corresponding author
Li, Deming
Venue
Aging Neuropsychology and Cognition
Published
2007-11-14
Volume
14
Issue
6
Pages
631-646
ISSN
  • 0928-9917 (ISSN-L)
  • 1382-5585
  • 1744-4128
OpenAlex
W2104286480
Cited by
90
References
40
Citations by year
2025: 6 · 2024: 4 · 2023: 6 · 2022: 5 · 2021: 8 · 2020: 6 · 2019: 6 · 2018: 8 · 2017: 6 · 2016: 4 · 2015: 3 · 2014: 8 · 2013: 5 · 2012: 4
FWCI
1.26
Type
journal article
Language
en
Open access
closed
Locations
  • Aging Neuropsychology and Cognition (publishedVersion)
  • PubMed (publishedVersion)
  • Institutional Repository of Institute of Psychology, Chinese Academy of Sciences (Institute of Psychology, Chinese Academy of Sciences) (submittedVersion)
Funders
National Natural Science Foundation of China
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Abilities and Testing
  • Social Sciences › Psychology › Neuropsychology and Physiological Psychology › Aging and Gerontology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
Keywords
working memory updating, processing speed, fluid intelligence, age differences, mediation, cognitive aging, executive function
MeSH terms
Adolescent, Adult, Aged, Aged, 80 and over, Aging, Female, Humans, Intelligence, Intelligence Tests, Male, Memory, Short-Term, Mental Processes, Middle Aged, Neuropsychological Tests, Reaction Time

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