Category: Intelligence

It lead to higher scores on measures of IQ, self-control and grit.

Taking a midday nap is linked to higher IQ scores, new research finds.

Naps have even been linked to similar cognitive boosts as those provided by a full night’s sleep.

Children in the study who took a nap were happier and scored higher on measures of verbal IQ, self-control and grit.

Around 20 percent of children are drowsy during the school day, which a nap helps alleviate.

Poor sleep has negative effects on the cognitions, emotions and physiology.

Professor Adrian Raine, study co-author, said:

“Children who napped three or more times per week benefit from a 7.6% increase in academic performance in Grade 6.

How many kids at school would not want their scores to go up by 7.6 points out of 100?”

The conclusions come from a study of 2,928 children in China, where napping is more commonplace — even in adulthood.

The children were followed from when they were toddlers through to adolescence, with various tests given periodically.

The results showed that longer naps were linked to better performance in tests of verbal IQ.

Dr Sara Mednick, study co-author, said:

“Many lab studies across all ages have demonstrated that naps can show the same magnitude of improvement as a full night of sleep on discrete cognitive tasks.

Here, we had the chance to ask real-world, adolescent schoolchildren questions across a wide range of behavioral, academic, social, and physiological measures.

The more students sleep during the day, the greater the benefit of naps on many of these measures.”

Students who napped were also more likely to be better behaved.

Dr Jianghong Liu, the study’s first author, said:

“The midday nap is easily implemented, and it costs nothing.

Not only will this help the kids, but it also takes away time for screen use, which is related to a lot of mixed outcomes.”

The study was published in the journal Sleep (Liu et al., 2019).

The dietary supplement creatine can improve both your memory and intelligence.

Creatine — a popular dietary supplement — boosts IQ and working memory, research finds.

Creatine is generally known as a supplement used by athletes for gaining muscle mass.

But that is not its only effect.

For the research vegetarians and vegans were given creatine supplementation.

Dr Caroline Rae, who led the study, explained the choice:

“Vegetarians or vegans were chosen for the study as carnivores and omnivores obtain a variable level of creatine depending on the amount and type of meat they eat – although to reach the level of supplementation in this experiment would involve eating around 2 kg of meat a day!”

Dr Rae said that creatine was a natural choice to test:

“We know that creatine plays a pivotal role in maintaining energy levels in the brain.

So it was a reasonable hypothesis that supplementing a diet with creatine could assist brain function.”

The creatine supplementation was tested over six weeks with participants taking 5g each day.

Dr Rae explained the results of the cognitive tests:

“Both of these tests require fast brain power and the Raven’s task was conducted under time pressure.

The results were clear with both our experimental groups and in both test scenarios: creatine supplementation gave a significant measurable boost to brain power.

For example in the digit span test subjects ability to remember long numbers, like telephone numbers, improved from a number length of about 7 to an average of 8.5 digits.

These findings underline a dynamic and significant role of brain energy capacity in influencing brain performance.

Increasing the energy available for computation increases the power of the brain and this is reflected directly in improved general ability.”

Olfactory disadvantage

Be aware, though, that long-term creatine supplementation has not been fully tested.

There are also certain olfactory disadvantages:

“To be frank taking the supplement can make you a considerably less ‘fragrant’ person.

However creatine supplementation may be of use to those requiring boosted mental performance in the short term – for example university students.”

The study was published in the journal Proceedings of the Royal Society: Biological Sciences (Rae et al., 2013).