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the claim

Learning a second language improves cognitive function in adults.

the verdict
INSUFFICIENT LEANING
Recorded sources
5 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that learning a second language improves cognitive function in adults?

Unclear. Several reviews and one small intervention study suggest second-language learning is associated with improvements in specific cognitive domains such as attention, working memory and executive function in older adults, but the evidence is inconsistent and the reviews describe cognitive-reserve benefits as limited and preliminary. No retrieved item settles the general claim that learning a second language improves cognitive function in adults.

Verdict: PARTIAL LEAN · 5 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 5
Cognitive skill
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Cognitive skill. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Cognitive_skill

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More for · 4
HOW LEARNING A SECOND LANGUAGE CHANGES YOUR BRAIN
2025
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HOW LEARNING A SECOND LANGUAGE CHANGES YOUR BRAIN. (2025). doi.org. https://doi.org/10.5281/zenodo.15254990

Effects of Second Language Learning on the Plastic Aging Brain: Functional Connectivity, Cognitive Decline, and Reorganization
2019
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Bubbico, G., Chiacchiaretta, P., Parenti, M., Marco, M. d., Panara, V., Sepede, G., Ferretti, A., & Perrucci, M. (2019). Effects of Second Language Learning on the Plastic Aging Brain: Functional Connectivity, Cognitive Decline, and Reorganization. doi.org. https://doi.org/10.3389/fnins.2019.00423

Does Second Language Learning Promote Neuroplasticity in Aging? A Systematic Review of Cognitive and Neuroimaging Studies
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Does Second Language Learning Promote Neuroplasticity in Aging? A Systematic Review of Cognitive and Neuroimaging Studies. (n.d.). cir.nii.ac.jp. https://doi.org/10.3389/fnagi.2021.706672

Neuroplasticity in adult second language learning: a systematic scoping review of structural and functional neuroimaging evidence.
2026
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AH, A. (2026). Neuroplasticity in adult second language learning: a systematic scoping review of structural and functional neuroimaging evidence.. doi.org. https://doi.org/10.3389/fnhum.2026.1824559

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