Menus Subscribe Search

Follow us


dementia-illustration

(PHOTO: LIGHTSPRING/SHUTTERSTOCK)

More Evidence Bilingualism Delays Onset of Dementia

• November 06, 2013 • 1:00 PM

(PHOTO: LIGHTSPRING/SHUTTERSTOCK)

Research from India shows the buffering effect of bilingualism even extends to the illiterate.

It’s very difficult to predict whether we’re going to be afflicted with dementia in our old age. But if that’s the trajectory we’re on, we’d surely like to delay its onset as long as possible.

Newly published research from India suggests one way of doing that might be to learn a second language.

“This is the largest study so far documenting a delayed onset of dementia in bilingual patients,” a research team led by neurologist Suvarna Alladi of Nizam’s Institutes of Medical Sciences writes in the journal Neurology.

“Overall, bilingual patients developed dementia 4.5 years later than the monolingual ones.”

The paper provides evidence that bilingualism slows the onset of three different types of dementia. It’s also the first study to show this dynamic also applies to the illiterate—a finding that suggests the protective effect of bilingualism “cannot be reduced to differences in education.”

Over the past few years, several small-scale studies have been released suggesting that knowing a second language delays dementia. To see if they could obtain similar results in their home country, Alladi and her colleagues studied case records of 648 patients who were diagnosed with dementia at a specialized clinic. More than half of them, 391, were bilingual.

“Overall, bilingual patients developed dementia 4.5 years later than the monolingual ones,” the researchers write. This effect, they add, “was shown independently of other potential confounding factors such as education, sex, occupation, and urban vs. rural dwelling of subjects.”

The four-and-a-half-year delay “was almost identical to that reported in previous studies,” Alladi and her colleagues add. It was consistent in three different types of dementia: frontotemporal, vascular, and Alzheimer’s disease.

Exactly why speaking two or more languages seems to protect against dementia remain unclear. A 2011 Canadian study that examined the brain atrophy of Alzheimer’s patients tentatively concluded it increases one’s “cognitive reserve,” meaning one could suffer more damage to the brain before becoming symptomatic.

Alladi and her colleagues speculate that the practice of switching quickly from one language to another may keep one’s “attention and executive functions” sharp, acting as a buffer against encroaching dementia.

“Our results offer strong evidence for the protective effect of bilingualism against dementia, in a population radically different from populations studied so far,” they conclude.

In other words, speaking multiple language seems to serve as a buffer against some of our most feared brain disorders—even beyond the “weird” world.

Tom Jacobs
Staff writer Tom Jacobs is a veteran journalist with more than 20 years experience at daily newspapers. He has served as a staff writer for The Los Angeles Daily News and the Santa Barbara News-Press. His work has also appeared in The Los Angeles Times, Chicago Tribune, and Ventura County Star.

More From Tom Jacobs

A weekly roundup of the best of Pacific Standard and PSmag.com, delivered straight to your inbox.

Recent Posts

December 19 • 4:00 PM

How a Drug Policy Reform Organization Thinks of the Children

This valuable, newly updated resource for parents is based in the real world.


December 19 • 2:00 PM

Where Did the Ouija Board Come From?

It wasn’t just a toy.


December 19 • 12:00 PM

Social Scientists Can Do More to Eradicate Racial Oppression

Using our knowledge of social systems, all social scientists—black or white, race scholar or not—have an opportunity to challenge white privilege.


December 19 • 10:17 AM

How Scientists Contribute to Bad Science Reporting

By not taking university press officers and research press releases seriously, scientists are often complicit in the media falsehoods they so often deride.


December 19 • 10:00 AM

Pentecostalism in West Africa: A Boon or Barrier to Disease?

How has Ghana stayed Ebola-free despite being at high risk for infection? A look at their American-style Pentecostalism, a religion that threatens to do more harm than good.


December 19 • 8:00 AM

Don’t Text and Drive—Especially If You’re Old

A new study shows that texting while driving becomes even more dangerous with age.


December 19 • 6:12 AM

All That ‘Call of Duty’ With Your Friends Has Not Made You a More Violent Person

But all that solo Call of Duty has.


December 19 • 4:00 AM

Food for Thought: WIC Works

New research finds participation in the federal WIC program, which subsidizes healthy foods for young children, is linked with stronger cognitive development and higher test scores.


December 18 • 4:00 PM

How I Navigated Life as a Newly Sober Mom

Saying “no” to my kids was harder than saying “no” to alcohol. But for their sake and mine, I had to learn to put myself first sometimes.


December 18 • 2:00 PM

Women in Apocalyptic Fiction Shaving Their Armpits

Because our interest in realism apparently only goes so far.


December 18 • 12:00 PM

The Paradox of Choice, 10 Years Later

Paul Hiebert talks to psychologist Barry Schwartz about how modern trends—social media, FOMO, customer review sites—fit in with arguments he made a decade ago in his highly influential book, The Paradox of Choice: Why More Is Less.


December 18 • 10:00 AM

What It’s Like to Spend a Few Hours in the Church of Scientology

Wrestling with thetans, attempting to unlock a memory bank, and a personality test seemingly aimed at people with depression. This is Scientology’s “dissemination drill” for potential new members.


December 18 • 8:00 AM

Gendering #BlackLivesMatter: A Feminist Perspective

Black men are stereotyped as violent, while black women are rendered invisible. Here’s why the gendering of black lives matters.


December 18 • 7:06 AM

Apparently You Can Bring Your Religion to Work

New research says offices that encourage talk of religion actually make for happier workplaces.


December 18 • 6:00 AM

The Very Weak and Complicated Links Between Mental Illness and Gun Violence

Vanderbilt University’s Jonathan Metzl and Kenneth MacLeish address our anxieties and correct our assumptions.


December 18 • 4:00 AM

Should Movies Be Rated RD for Reckless Driving?

A new study finds a link between watching films featuring reckless driving and engaging in similar behavior years later.


December 17 • 4:00 PM

How to Run a Drug Dealing Network in Prison

People tend not to hear about the prison drug dealing operations that succeed. Substance.com asks a veteran of the game to explain his system.


December 17 • 2:00 PM

Gender Segregation of Toys Is on the Rise

Charting the use of “toys for boys” and “toys for girls” in American English.


December 17 • 12:41 PM

Why the College Football Playoff Is Terrible But Better Than Before

The sample size is still embarrassingly small, but at least there’s less room for the availability cascade.


December 17 • 11:06 AM

Canadian Kids Have a Serious Smoking Problem

Bootleg cigarette sales could be leading Canadian teens to more serious drugs, a recent study finds.


December 17 • 10:37 AM

A Public Lynching in Sproul Plaza

When photographs of lynching victims showed up on a hallowed site of democracy in action, a provocation was issued—but to whom, by whom, and why?


December 17 • 8:00 AM

What Was the Job?

This was the year the job broke, the year we accepted a re-interpretation of its fundamental bargain and bought in to the push to get us to all work for ourselves rather than each other.


December 17 • 6:00 AM

White Kids Will Be Kids

Even the “good” kids—bound for college, upwardly mobile—sometimes break the law. The difference? They don’t have much to fear. A professor of race and social movements reflects on her teenage years and faces some uncomfortable realities.



December 16 • 4:00 PM

How Fear of Occupy Wall Street Undermined the Red Cross’ Sandy Relief Effort

Red Cross responders say there was a ban on working with the widely praised Occupy Sandy relief group because it was seen as politically unpalatable.


Follow us


Don’t Text and Drive—Especially If You’re Old

A new study shows that texting while driving becomes even more dangerous with age.

Apparently You Can Bring Your Religion to Work

New research says offices that encourage talk of religion actually make for happier workplaces.

Canadian Kids Have a Serious Smoking Problem

Bootleg cigarette sales could be leading Canadian teens to more serious drugs, a recent study finds.

The Hidden Psychology of the Home Ref

That old myth of home field bias isn’t a myth at all; it’s a statistical fact.

The Big One

One in two United States senators and two in five House members who left office between 1998 and 2004 became lobbyists. November/December 2014

Copyright © 2014 by Pacific Standard and The Miller-McCune Center for Research, Media, and Public Policy. All Rights Reserved.