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Being bilingual delays the onset of dementia symptoms.
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CONTESTED PARTIAL
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10 sources for · 1 against
Is it true that being bilingual delays the onset of dementia symptoms?
Partly. Several retrospective clinic studies and meta-analyses report that bilingual patients show dementia symptoms roughly 4 to 4.5 years later than monolinguals, but a review notes prospective cohort studies find no such association, and one study finds the delay only in behavioral frontotemporal dementia, not aphasic forms. The evidence partially supports a delay while remaining contested.
Verdict: CONTESTED PARTIAL · 10 sources for, 1 against · Last checked
Evidence for · 10
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E, B., FI, C., & M, F. (2007). Bilingualism as a protection against the onset of symptoms of dementia.. doi.org. https://doi.org/10.1016/j.neuropsychologia.2006.10.009
Evidence against · 1
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Klimova, B., Valis, M., & Kuca, K. (2017). Bilingualism as a strategy to delay the onset of Alzheimer's disease.. doi.org. https://doi.org/10.2147/CIA.S145397
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More for · 9
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Bilingualism delays age at onset of dementia, independent of education and immigration status. (2013). doi.org. https://doi.org/10.1212/01.wnl.0000436620.33155.a4
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Alladi, S., Bak, T. H., Shailaja, M., Gollahalli, D., Rajan, A., Surampudi, B., Hornberger, M., Duggirala, V., Chaudhuri, J. R., & Kaul, S. (2017). Bilingualism delays the onset of behavioral but not aphasic forms of frontotemporal dementia.. doi.org. https://doi.org/10.1016/j.neuropsychologia.2017.03.021
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Calabria, M., Hernández, M., Cattaneo, G., Suades, A., Serra, M., Juncadella, M., Reñé, R., Sala, I., Lleó, A., Ortiz-Gil, J., Ugas, L., Ávila, A., Ruiz, I. G., Ávila, C., & Costa, A. (2020). Active bilingualism delays the onset of mild cognitive impairment.. doi.org. https://doi.org/10.1016/j.neuropsychologia.2020.107528
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Bilingualism Is Associated with a Delayed Onset of Dementia but Not with a Lower Risk of Developing it: a Systematic Review with Meta-Analyses - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.1007/s11065-020-09426-8
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Paulavicius, A. M., Mizzaci, C. C., Tavares, D. R. B., Rocha, A. P., Civile, V. T., Schultz, R. R., Pinto, A. C. P. N., & Trevisani, V. F. M. (2020). Bilingualism for delaying the onset of Alzheimer's disease: a systematic review and meta-analysis.. doi.org. https://doi.org/10.1007/s41999-020-00326-x
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Can foreign language learning boost cognitive flexibility in late-life depression?. (2020). hdl.handle.net. https://hdl.handle.net/11370/646cba43-05d8-4d4d-8458-f9730bcf404f
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Does bilingualism contribute to cognitive reserve? Cognitive and neural perspectives.. (2015). doi.org. https://doi.org/10.1037/neu0000105
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Perani, D. & Abutalebi, J. (2015). Bilingualism, dementia, cognitive and neural reserve.. doi.org. https://doi.org/10.1097/WCO.0000000000000267
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Daniela, P., Mohsen, F., & Tommaso, B. (2017). The impact of bilingualism on brain reserve and metabolic connectivity in Alzheimer's dementia.. zenodo.org. https://doi.org/10.1073/pnas.1610909114
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