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Published on: February 26, 2020
Does bilingualism protect against cognitive aging?: Methodological issues in research on bilingualism, cognitive
Caitlin Wei-Ming Watson1, Jennifer J Manly2, Laura B Zahodne2
1Columbia University Medical Center, Neurology, Clinical Research Coordinator, 630 West 168th Street, P&S Box 16, New York, 10032, UNITED STATES.
Abstract:
Recent studies of bilingualism as a protective factor in cognitive aging have reported conflicting findings, and researchers have begun to explore the methodological complications that may explain differences across studies. This article details the current research landscape and addresses several issues relevant to the study of bilingualism and late-life cognitive function: study design, establishing causal relationships, confounding factors, operationalizing bilingualism, predicting cognitive level versus cognitive change, and incorporating brain structural variables to interrogate cognitive reserve.
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