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the claim
Working memory is entirely equivalent to fluid intelligence
the verdict
REFUTED
the evidence says no
refutedsupported
the weight of evidence
0 sources for · 6 against

Working memory and fluid intelligence are closely related but distinct cognitive constructs, with research demonstrating that working memory is only one component contributing to fluid intelligence rather than being entirely equivalent to it.

Evidence against · 6
Quantity not quality: The relationship between fluid intelligence and working memory capacity
2010 · cited by 420
Paper [0] demonstrates that only specific sub-factors of working memory capacity relate to fluid intelligence, showing they are not entirely equivalent constructs.
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The analysis

The claim states that working memory is 'entirely equivalent' to fluid intelligence. Multiple retrieved papers explicitly demonstrate that while working memory and fluid intelligence are strongly correlated, they are separable constructs; working memory capacity is only a partial mediator or contributor to fluid intelligence, and other factors are involved. Therefore, the claim is refuted by the literature.

More against · 5
Working memory capacity mediates the relationship between removal and fluid intelligence
2018 · cited by 22
Paper [1] finds that working memory capacity mediates the relationship between removal efficiency and fluid intelligence, indicating distinct underlying cognitive components.
Individual Differences in Attention Control
2020 · cited by 17
Paper [2] notes that while working memory and fluid intelligence share attentional resources, they are distinct constructs that require different allocations.
Strategy use moderates the relation between working memory capacity and fluid intelligence: A combined approach
2021 · cited by 14
Paper [3] shows that strategy use moderates the relationship between working memory capacity and fluid intelligence, indicating they are separate cognitive domains.
Fluid Intelligence Is (Much) More than Working Memory Capacity: An Experimental Analysis
2023 · cited by 11
Paper [4] proves experimentally that while working memory functioning causally affects fluid intelligence, other distinct factors also significantly contribute to fluid intelligence.
Mapping Executive Function Performance Based on Resting-State EEG in Healthy Individuals: A Systematic and Mechanistic Review.
2026 · cited by 1
Paper [10] reviews resting-state EEG and executive functions, distinguishing between working memory components and broader executive performance.
Everything we examined (12)
We also searched for evidence AGAINST this claim, not only for it.
  1. Quantity not quality: The relationship between fluid intelligence and working memory capacitypeer-reviewedrefutes
  2. Working memory capacity mediates the relationship between removal and fluid intelligencepeer-reviewedrefutes
  3. Individual Differences in Attention Controlpeer-reviewedrefutes
  4. Strategy use moderates the relation between working memory capacity and fluid intelligence: A combined approachpeer-reviewedrefutes
  5. Fluid Intelligence Is (Much) More than Working Memory Capacity: An Experimental Analysispeer-reviewedrefutes
  6. Intelligence and Cognitive Development: Three Sides of the Same Coinpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  7. Morphometric MRI findings in patients with suspected autoimmune psychosis spectrum syndromes and association with EEG slowing, CSF changes, and psychometric/neuropsychological findings.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  8. MR spectroscopic imaging and its association with EEG, CSF, and psychometric/neuropsychological findings in patients with suspected autoimmune psychosis spectrum syndromes.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  9. Baseline Pupil Size Seems Unrelated to Fluid Intelligence, Working Memory Capacity, and Attentional Controlpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  10. The effect of age and fluid intelligence on working memory in different modalities among elderly individuals: a moderated mediation analysispeer-reviewedno side takennot shown: read and judged not to bear on this claim
  11. Mapping Executive Function Performance Based on Resting-State EEG in Healthy Individuals: A Systematic and Mechanistic Review.peer-reviewedrefutes
  12. Measuring Cognitive Ability in Children and Adolescentspeer-reviewedno side takennot shown: read and judged not to bear on this claim
The paper trail · every fact has a biography
first checked06 Aug 2026
judged → REFUTED · 1606 Aug 2026
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