Why does cognitive training yield inconsistent benefits? A meta-analysis of individual differences in baseline cognitive abilities and training outcomes
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Despite growing interest in improving cognitive abilities across the lifespan through training, the benefits of cognitive training are inconsistent. One powerful contributor may be that individuals arrive at interventions with different baseline levels of the cognitive skill being trained. Some evidence suggests poor performers benefit the most from cognitive training, showing compensation for their weak abilities, while other evidence suggests that high performers benefit most, experiencing a magnification of their abilities. Whether training leads to compensation or magnification effects may depend upon the specific cognitive domain being trained (such as executive function or episodic memory) and the training approach implemented (strategy or process). To clarify the association between individual differences in baseline cognitive ability and training gains as well as potential moderators, we conducted a systematic meta-analysis of the correlation between these two variables. We found evidence of a significant meta-correlation demonstrating a compensatory effect, a negative association between initial ability on a trained cognitive process and training gains. Too few papers met our search criteria across the levels of proposed moderators of cognitive domain and training approach to conduct a reliable investigation of their influence over the meta-analytic effect size. We discuss the implications of a compensatory meta-correlation, potential reasons for the paucity of qualifying papers, and important future directions for better understanding how cognitive trainings work and for whom.
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Individuals with lower baseline cognitive ability demonstrate greater performance gains following cognitive training compared to those with higher baseline cognitive ability.
“For instance, individuals with lower baseline cognitive ability demonstrate greater performance gains following cognitive training compared to those with higher baseline cognitive ability, potentially due to a sufficient “mismatch” between the task demand and functional supply of the brain [68–72].”
From Primary outcome from the augmenting cognitive training in older adults study (ACT): A tDCS and cognitive training randomized clinical trial (2023) · cites this paper as [69]
The Results (§3.2.2; page not available in our copy) report a significant negative correlation: lower baseline performers tended to gain more from training. But the authors call the result inconclusive and report substantial heterogeneity, so the unqualified claim is stronger than their finding. (LLM, conf=0.86)
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- Authors
- Traut, H. J., Guild, R. M., & Munakata, Y.
- Affiliations
- University of Colorado Boulder (US)
- University of California, Davis (US)
- Corresponding author
- Traut, Hilary J.
- Venue
- Frontiers in Psychology
- Publisher
- Frontiers Media SA
- Published
- 2021-05-26
- Volume
- 12
- Pages
- 662139-662139
- ISSN
- 1664-1078 (ISSN-L)
- PMC
- PMC8187947
- OpenAlex
- W3164249540
- Cited by
- 100
- References
- 82
- Citations by year
- 2026: 23 · 2025: 20 · 2024: 25 · 2023: 13 · 2022: 16 · 2021: 3
- FWCI
- 2.33
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Frontiers in Psychology (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- eScholarship (California Digital Library) (submittedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- eScholarship (California Digital Library) (submittedVersion)
- Funders
- National Institute of Child Health and Human Development
- Topics
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Abilities and Testing
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Functions and Memory
- Physical Sciences › Mathematics › Statistics and Probability › Cognitive and developmental aspects of mathematical skills
- Keywords
- cognitive training, individual differences, compensation effect, magnification effects, executive function, episodic memory, strategy training, process training
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