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Study: bilingualism linked to younger brain age

scienceJul 6, 20268164

Researchers presenting at the Federation of European Neuroscience Societies meeting in Barcelona reported that people who speak two languages have brains that appear about six years younger than those who speak only one, based on magnetoencephalography scans processed with AI. The team scanned 728 participants with varying ages and language experience to model normal brain connectivity by age, then compared a separate group of 144 people with equal numbers speaking one, two, three or four languages. Speakers of three languages showed brains about seven years younger and speakers of four languages about 13 years younger; higher proficiency and earlier acquisition of a second language were also linked to greater delay in brain ageing. The study sampled residents of the Basque region who spoke Spanish, Basque, French and/or English and controlled for age, sex and education, but the authors cautioned that lifestyle and social factors could still influence results. Dr Lucia Amoruso said the findings indicate multilingual experience matters as a gradient rather than a binary bilingual effect, and Prof Christina Dalla urged support for language learning in schools and across the lifespan. Loughborough University’s Eef Hogervorst advised caution in interpreting causation from the association.

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