Being bilingual can help keep your brain in good condition

A  silohuette of a side profile of a womans head inside her head space is a ocean sunset

Learning and understanding a new language is one of the most challenging things that your brain can do. But as well as the advantage of acquiring another language, it appears that the effort of giving your brain a good workout today by being bilingual could keep it in better condition in later life.

Research led by Dr. Daniela Perani, a professor of psychology at in Milan, found that people who speak two or more languages seem to weather the ravages of Alzheimer’s disease better compared to people who have only mastered one language. Alzheimer’s is a progressive mental deterioration that can begin in middle or old age due to generalized brain degeneration.

The study involved 85 people with Alzheimer’s – half of whom spoke both German and Italian and half who spoke only one language. The researchers found that bilingual patients had greater connectivity in key brain areas. This was especially in the part of the brain that governs “executive control” – a set of necessary behavioral cognitive processes that include problem-solving, working memory, reasoning and attentional control. The study also noted that the bilingual Alzheimer’s patients showed less severe symptoms of the disease.

The study concluded: “Our findings suggest that the effects of speaking two languages are more powerful than both age and education in providing a protection against cognitive decline.”

Bilingualism and the brain

Although Alzheimer’s disease is currently incurable, the study supports a popular theory that people who have higher levels of education function longer with little manifestation of the illness. Part of the reason why bilingual brains may be better at resisting Alzheimer’s could be due to a lifetime of switching between languages daily.

Learning and speaking more than one language changes how the brain carries out tasks that require focus and concentration on a certain piece of information without being distracted. It can also increase the density of white matter (connections) in the brain, meaning that there are more connections between brain parts, thus making this part of the brain more resistant to degeneration.

This is supported by a study conducted by a team led by Professor Ana Inés Ansaldo at the , which suggests that bilingual people have more robust and more efficient brains compared to those who only speak one language. This is one of the reasons why a bilingual brain can be a buffer against aging and dementia.

They recruited elderly people, half of whom spoke only one language and the other half who had learned a second language between the ages of 11 and 18. All performed equally well on a task that involved focusing on an object's color while ignoring its position, but brain scans revealed a big difference in how they processed the task.

“While bilinguals were recruiting very specific brain areas and a small number of areas to perform the task, monolinguals were recruiting a much larger number of areas that were consuming much more resources. And the networks they were using were very, very complex,” says Professor Ansaldo. “That led us to think that the bilingual brain was more efficient in terms of the amount of resources that bilingual people require to do complex tasks as opposed to the monolingual brain.”

The study concludes that bilingualism shapes the brain in a different way or how people approach complex tasks. It could be because bilinguals must inhibit the language they are not using to focus on the one that they are using.

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    When we used to go somewhere by car, my son, who was just three years old, would repeatedly ask me, "How far do we need to go?" every five minutes. He was curious to know where we were and how close we were to our destination. Even though the answer was just a number, it would satisfy him and relieve his curiosity.

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    Implementing the GSE

    Our implementation process started with conducting in-service training sessions for the faculty members, many of whom were also unfamiliar with the GSE. To ensure comprehensive understanding, we organized meetings with the teacher trainers responsible for teaching the methodology courses. These sessions consisted of in-depth discussions on the nature of the GSE, its significance in language teaching and practical guidance on integrating it into the curriculum we were following.

    As the second step, we designed a lesson plan to be used for the first methodology course our pre-service teacher trainees would undertake for the same objective we had for in-service teacher training sessions. In this initial lesson, we started by discussing the aims of CEFR and GSE, highlighting their differences.

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    What did we gain by integrating the GSE into our pre-service teacher education program? Quite a few significant benefits, actually. Firstly, it standardized the language and terminology used throughout the department; when we refer to terms like 'learning outcomes', 'proficiency of language learners' or 'learner progress', everyone understands the set of terms uniformly across our department. No need to mention that our pre-service teachers gained the privilege of being introduced to a widely recognized toolkit in the field. While their peers may not yet be familiar with the GSE, our students gain early exposure to this valuable resource. Incorporating the GSE into our program also has allowed our pre-service teachers access to a range of valuable resources.

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    Next steps

    What's next? There's still much to accomplish and a considerable journey ahead of us. Currently, our primary focus is on making our initiatives more public, aiming to share our experiences with other pre-service teacher education programs considering integrating the GSE into their curriculum. In addition, introducing the GSE to in-service teacher programs in Turkey and globally could also be valuable for enhancing language teaching practices and the professional development of language teachers worldwide.

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    As a result, we are very pleased with the integration of the GSE into our teacher education program, as it has paved the way for significant advances. While recognizing there's still a considerable journey ahead, we also celebrate the progress we've made thus far and are curious about the other possible opportunities that lie ahead.

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