AsianScientist (Apr. 11, 2024) – Previous studies have shown that being bilingual can have positive effects on cognitive reserve, mental flexibility, attention control, and working memory in children and young adults. These abilities, also known as theory of mind, are essential for understanding others’ behavior. Researchers from the Singapore University of Technology and Design (SUTD) and their collaborators from the National University of Singapore (NUS) wanted to investigate if these benefits persist into old age.
In a study involving 96 young and older adults, the researchers found that early bilingualism may help protect theory of mind abilities from age-related declines. The study was published in Scientific Reports.
As people age, changes occur in both the body and the brain. Specific brain regions shrink, and communication between neurons becomes less efficient, leading to cognitive decline in areas such as language, memory, and planning. Professor Yow Wei Quin from SUTD explained, “Cognitive reserve allows the brain to adapt and compensate for declines, utilizing different brain regions to complete tasks.”
Cognitive reserve is closely tied to brain reserve, which encompasses features like brain size and neural connections. Yow added, “Individuals with greater reserves are more likely to maintain cognitive function as they age due to the brain’s flexibility and resilience.”
The study recruited 46 young adults and 50 older adults from Singapore, all of whom were bilingual or multilingual, speaking English and Mandarin. Participants completed various cognitive tasks and MRI scans to assess brain structure and function.
The researchers found that learning a second language early in life was associated with increased gray matter volume and cortical thickness in the brains of both young and old adults. These changes could help preserve social and cognitive abilities as individuals age.
Dr. Li Xiaoqian, co-first author of the study, noted, “Our findings suggest that bilingualism can benefit social cognition and promote healthier aging.”
The study’s results underscore the importance of early bilingual education and lifelong bilingualism in maintaining social cognitive function as people age. By delaying age-related neurocognitive decline, individuals can live independently for longer periods.
Future research will focus on analyzing the impact of bilingualism on social cognition using functional magnetic resonance imaging (fMRI) data collected during social-cognitive tasks. fMRI detects changes in brain activity by measuring blood flow, providing insights into the brain regions involved in key functions.
Overall, bilingualism offers more than just language skills—it can enhance social cognition and contribute to healthy aging by enabling individuals to engage in meaningful activities, maintain relationships, and reduce the need for care in later life.
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