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Related Experiment Videos

Working memory and intelligence: the same or different constructs?

Phillip L Ackerman1, Margaret E Beier, Mary O Boyle

  • 1School of Psychology, Georgia Institute of Technology, Atlanta, GA 30332-0170, USA. phillip.ackerman@psych.gatech.edu

Psychological Bulletin
|January 6, 2005
PubMed
Summary
This summary is machine-generated.

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Working memory (WM) and general intelligence (g) are not identical. A meta-analysis of 86 studies found a correlation of .479, indicating they are related but distinct cognitive constructs.

Area of Science:

  • Cognitive Psychology
  • Psychometrics
  • Intelligence Research

Background:

  • Recent research suggests working memory (WM) and general intelligence (g) are nearly identical.
  • This claim lacks comprehensive evaluation despite memory measures being common in intelligence tests.

Purpose of the Study:

  • To comprehensively evaluate the identity between WM and g using a meta-analytic approach.
  • To differentiate the relationship between short-term memory, WM, and intelligence.

Main Methods:

  • Conducted a meta-analysis of 86 independent samples correlating WM and intelligence (g).
  • Performed a supplemental meta-analysis to distinguish short-term memory from WM in relation to intelligence.

Main Results:

Related Experiment Videos

  • The average correlation between true-score estimates of WM and g was .479, substantially less than unity.
  • This indicates WM and g are related but distinct constructs.

    • Conclusions:

    • WM and g are not identical, challenging previous claims of near-identity.
    • Psychometric and theoretical considerations are crucial for understanding the complex relationship between WM and intelligence.