Mental speed does not start to slow until people turn 60, four decades later than previously thought, a study has suggested.
Researchers say their analysis of more than a million people challenges previous assumptions that mental speed peaks at age 20.
As humans age, it takes longer to react to changes in the environment or stimuli.
This slowing of response time starts from the age of about 20, gradually continuing to slow as people age.
The new study found that although response times started to slow after 20, this could be because people make more cautious decisions and engage in processes not linked to decision-making at a slower rate, such as taking more time to press a computer key.
However, the mental process of making decisions does not start to slow down until age 60, after which it progressively declines.
Mischa von Krause of Heidelberg University in Germany and colleagues looked at data from more than one million people who took part in an online experiment that measured their reaction times to a mental task.
Participants had to categorise a selection of words and images that flashed up on a screen as belonging to one of two categories, for example good or bad, by pushing the correct key in response.
Despite a widespread belief in age-related slowdowns in mental speed, the findings highlight that, for much of life and during the span of a typical career, this is not likely to be the case.
“Our results indicate that response time slowing begins as early as age 20, but this slowing was attributable to increases in decision caution and to slower non-decisional processes, rather than to differences in mental speed,” said the researchers, writing in Nature Human Behaviour.
“Slowing of mental speed was observed only after approximately age 60.
“Our research thus challenges widespread beliefs about the relationship between age and mental speed.”
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Frankenstein in Baghdad
Ahmed Saadawi
Penguin Press
U19 WORLD CUP, WEST INDIES
Jaishankar, Nilansh Keswani, Aayan Khan, Punya Mehra, Ali Naseer, Ronak Panoly,
Dhruv Parashar, Vinayak Raghavan, Soorya Sathish, Aryansh Sharma, Adithya
Shetty, Kai Smith
Under 19 World Cup
Group A: India, Japan, New Zealand, Sri Lanka
Group B: Australia, England, Nigeria, West Indies
Group C: Bangladesh, Pakistan, Scotland, Zimbabwe
Group D: Afghanistan, Canada, South Africa, UAE
UAE fixtures
Saturday, January 18, v Canada
Wednesday, January 22, v Afghanistan
Saturday, January 25, v South Africa
The President's Cake
Director: Hasan Hadi
Starring: Baneen Ahmad Nayyef, Waheed Thabet Khreibat, Sajad Mohamad Qasem
Rating: 4/5
Plan to boost public schools
A major shake-up of government-run schools was rolled out across the country in 2017. Known as the Emirati School Model, it placed more emphasis on maths and science while also adding practical skills to the curriculum.
It was accompanied by the promise of a Dh5 billion investment, over six years, to pay for state-of-the-art infrastructure improvements.
Aspects of the school model will be extended to international private schools, the education minister has previously suggested.
Recent developments have also included the introduction of moral education - which public and private schools both must teach - along with reform of the exams system and tougher teacher licensing requirements.
While you're here
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Read more about the coronavirus
Timeline
2012-2015
The company offers payments/bribes to win key contracts in the Middle East
May 2017
The UK SFO officially opens investigation into Petrofac’s use of agents, corruption, and potential bribery to secure contracts
September 2021
Petrofac pleads guilty to seven counts of failing to prevent bribery under the UK Bribery Act
October 2021
Court fines Petrofac £77 million for bribery. Former executive receives a two-year suspended sentence
December 2024
Petrofac enters into comprehensive restructuring to strengthen the financial position of the group
May 2025
The High Court of England and Wales approves the company’s restructuring plan
July 2025
The Court of Appeal issues a judgment challenging parts of the restructuring plan
August 2025
Petrofac issues a business update to execute the restructuring and confirms it will appeal the Court of Appeal decision
October 2025
Petrofac loses a major TenneT offshore wind contract worth €13 billion. Holding company files for administration in the UK. Petrofac delisted from the London Stock Exchange
November 2025
180 Petrofac employees laid off in the UAE
On Women's Day
Dr Nawal Al-Hosany: Why more women should be on the frontlines of climate action
Shelina Janmohamed: Why shouldn't a spouse be compensated fairly for housework?
Justin Thomas: Challenge the notion that 'men are from Mars, women are from Venus'
The National Editorial: Is there much to celebrate on International Women's Day 2021?
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Gavin Esler: Will 2021 be Boris Johnson's worst year?
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RESULTS
The National's picks
4.35pm: Tilal Al Khalediah
5.10pm: Continous
5.45pm: Raging Torrent
6.20pm: West Acre
7pm: Flood Zone
7.40pm: Straight No Chaser
8.15pm: Romantic Warrior
8.50pm: Calandogan
9.30pm: Forever Young
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UPI facts
More than 2.2 million Indian tourists arrived in UAE in 2023
More than 3.5 million Indians reside in UAE
Indian tourists can make purchases in UAE using rupee accounts in India through QR-code-based UPI real-time payment systems
Indian residents in UAE can use their non-resident NRO and NRE accounts held in Indian banks linked to a UAE mobile number for UPI transactions
Know your Camel lingo
The bairaq is a competition for the best herd of 50 camels, named for the banner its winner takes home
Namoos - a word of congratulations reserved for falconry competitions, camel races and camel pageants. It best translates as 'the pride of victory' - and for competitors, it is priceless
Asayel camels - sleek, short-haired hound-like racers
Majahim - chocolate-brown camels that can grow to weigh two tonnes. They were only valued for milk until camel pageantry took off in the 1990s
Millions Street - the thoroughfare where camels are led and where white 4x4s throng throughout the festival
Pope Francis in UAE
Formula One top 10 drivers' standings after Japan
1. Lewis Hamilton, Mercedes 306
2. Sebastian Vettel, Ferrari 247
3. Valtteri Bottas, Mercedes 234
4. Daniel Ricciardo, Red Bull 192
5. Kimi Raikkonen, Ferrari 148
6. Max Verstappen, Red Bull 111
7. Sergio Perez, Force India 82
8. Esteban Ocon, Force India 65
9. Carlos Sainz Jr, Toro Rosso 48
10. Nico Hulkenberg, Renault 34
MATCH INFO
Manchester City 0
Wolves 2 (Traore 80', 90 4')
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Like a Fading Shadow
Antonio Muñoz Molina
Translated from the Spanish by Camilo A. Ramirez
Tuskar Rock Press (pp. 310)
The biog
DOB: March 13, 1987
Place of birth: Jeddah, Saudi Arabia but lived in Virginia in the US and raised in Lebanon
School: ACS in Lebanon
University: BSA in Graphic Design at the American University of Beirut
MSA in Design Entrepreneurship at the School of Visual Arts in New York City
Nationality: Lebanese
Status: Single
Favourite thing to do: I really enjoy cycling, I was a participant in Cycling for Gaza for the second time this year
Company%20Profile
Closing the loophole on sugary drinks
As The National reported last year, non-fizzy sugared drinks were not covered when the original tax was introduced in 2017. Sports drinks sold in supermarkets were found to contain, on average, 20 grams of sugar per 500ml bottle.
The non-fizzy drink AriZona Iced Tea contains 65 grams of sugar – about 16 teaspoons – per 680ml can. The average can costs about Dh6, which would rise to Dh9.
Drinks such as Starbucks Bottled Mocha Frappuccino contain 31g of sugar in 270ml, while Nescafe Mocha in a can contains 15.6g of sugar in a 240ml can.
Flavoured water, long-life fruit juice concentrates, pre-packaged sweetened coffee drinks fall under the ‘sweetened drink’ category
Not taxed:
Freshly squeezed fruit juices, ground coffee beans, tea leaves and pre-prepared flavoured milkshakes do not come under the ‘sweetened drink’ band.
Quick pearls of wisdom
Focus on gratitude: And do so deeply, he says. “Think of one to three things a day that you’re grateful for. It needs to be specific, too, don’t just say ‘air.’ Really think about it. If you’re grateful for, say, what your parents have done for you, that will motivate you to do more for the world.”
Know how to fight: Shetty married his wife, Radhi, three years ago (he met her in a meditation class before he went off and became a monk). He says they’ve had to learn to respect each other’s “fighting styles” – he’s a talk it-out-immediately person, while she needs space to think. “When you’re having an argument, remember, it’s not you against each other. It’s both of you against the problem. When you win, they lose. If you’re on a team you have to win together.”
Company%20Profile
Our family matters legal consultant
Name: Hassan Mohsen Elhais
Position: legal consultant with Al Rowaad Advocates and Legal Consultants.
Islamophobia definition
A widely accepted definition was made by the All Party Parliamentary Group on British Muslims in 2019: “Islamophobia is rooted in racism and is a type of racism that targets expressions of Muslimness or perceived Muslimness.” It further defines it as “inciting hatred or violence against Muslims”.
THE BIO
Ms Al Ameri likes the variety of her job, and the daily environmental challenges she is presented with.
Regular contact with wildlife is the most appealing part of her role at the Environment Agency Abu Dhabi.
She loves to explore new destinations and lives by her motto of being a voice in the world, and not an echo.
She is the youngest of three children, and has a brother and sister.
Her favourite book, Moby Dick by Herman Melville helped inspire her towards a career exploring the natural world.
World Mental Health Day
The specs: 2018 Jeep Grand Cherokee Trackhawk
Price, base: Dh399,999
Engine: Supercharged 6.2-litre V8
Gearbox: Eight-speed automatic
Power: 707hp @ 6,000rpm
Torque: 875Nm @ 4,800rpm
Fuel economy, combined: 16.8L / 100km (estimate)
Three tips from La Perle's performers
1 The kind of water athletes drink is important. Gwilym Hooson, a 28-year-old British performer who is currently recovering from knee surgery, found that out when the company was still in Studio City, training for 12 hours a day. “The physio team was like: ‘Why is everyone getting cramps?’ And then they realised we had to add salt and sugar to the water,” he says.
2 A little chocolate is a good thing. “It’s emergency energy,” says Craig Paul Smith, La Perle’s head coach and former Cirque du Soleil performer, gesturing to an almost-empty open box of mini chocolate bars on his desk backstage.
3 Take chances, says Young, who has worked all over the world, including most recently at Dragone’s show in China. “Every time we go out of our comfort zone, we learn a lot about ourselves,” she says.
