New Canadian research appearing in the February issue of the journal Neuropsychologia found that knowing two languages or more can postpone the onset of dementia in old age by more than four years.
Researchers recruited 184 Toronto-area residents for the study. They examined participants for knowledge of languages and the age at which signs of dementia began to appear. Men who spoke only one language were found to develop dementia at an average age of 70.8, while uni-lingual women developed the disorder at 71.9. However, among men who spoke at least two languages, onset of dementia was delayed until age 76.1, on average, while multi-lingual women developed dementia at an average of 75.1 years old.
When groups of men and women were combined, multi-lingual people experienced a delay in onset of dementia of 4.1 years, compared to those who spoke only one language.
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Speaking two languages into old age can stave off dementia, study finds
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