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the claim
IQ measures specific cognitive abilities and can be improved through interventions
the verdict
CONTESTED
the evidence cuts both ways
confidence 40/100

The claim that cognitive abilities and intelligence measures can be improved through interventions remains contested; while some studies show small positive gains from targeted cognitive or physical training, comprehensive meta-analyses often find limited transfer to broader fluid intelligence.

The evidence we hold leans leans supported

How this was weighed

official record 3x · fact-check 2x · hedged 1x · crowd & reference 1x

  • Neurophysiologic and Cognitive Changes Arising from Cognitiv · peer-reviewed · supports · weight 1.3 · 2018
  • Cognitive Plasticity Induced in Older Adults by Cognitive Tr · peer-reviewed · supports · weight 1.05 · 2021
  • Optimal exercise modalities and dose for enhancing intellige · peer-reviewed · supports · weight 1 · 2025
  • Who Wants to Enhance Their Cognitive Abilities? Potential Pr · peer-reviewed · refutes · weight 1.05 · 2023
  • Small Improvements in Working Memory After Cognitive Trainin · peer-reviewed · refutes · weight 1.05 · 2020
Evidence for · 3
Neurophysiologic and Cognitive Changes Arising from Cognitive Training Interventions in Persons with Mild Cognitive Impairment: A Systematic Review
2018 · cited by 26
This systematic review indicates that cognitive training interventions can improve objective cognitive performance in individuals with mild cognitive impairment.
Evidence against · 2
Who Wants to Enhance Their Cognitive Abilities? Potential Predictors of the Acceptance of Cognitive Enhancement
2023 · cited by 8
This study notes that while various cognitive enhancement methods promise improvements in intelligence and memory, they have generally been ineffective so far.
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More for · 2
Cognitive Plasticity Induced in Older Adults by Cognitive Training, Physical Exercise, and Combined Interventions
2021 · cited by 1
This study protocol highlights how physical and cognitive interventions can induce neuroplasticity and help preserve cognitive functions in aging adults.
Optimal exercise modalities and dose for enhancing intelligence in children and adolescents: a Bayesian network meta-analysis.
2025 · cited by 0
This network meta-analysis demonstrates that specific exercise interventions can lead to small-to-moderate improvements in general, fluid, and crystallized intelligence in children and adolescents.
More against · 1
Small Improvements in Working Memory After Cognitive Training do not Transfer to Fluid Intelligence: Evidence From a Meta-analysis
2020 · cited by 1
This meta-analysis finds that although working memory can show small training gains, these improvements do not reliably transfer to broader measures of fluid intelligence.
The paper trail · every fact has a biography
first checked01 Aug 2026
judged → CONTESTED · 4001 Aug 2026
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