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8 things you didn't know are making you dumber
It'd be nice to think that IQ is not a big determining factor for how successful and happy we are in life.
But not so, several studies will say.
One
study by the University of Delaware found that contrary to popular
belief, the higher your IQ, the more likely you are socially smart.
Another study, this time Swedish, has drawn a link between
lower IQ scores and suicidal feelings, hypothesising that lower IQs mean
poorer problem solving abilities, and thus a diminished ability in
dealing with stress in difficult situations.
And while genetics
make up an estimated 40 to 80 per cent of a person's IQ, there are a
number of factors that determine how smart you are, or how dumb you get.
Most
people would readily agree that getting a knock to the head would knock
some points off their IQ as well, but what if you were told that your
daily junk food habit is not only making you fat, it's making you
stupid?
And that those people who spend hours and hours holding
long, pointless meetings are not only lacking in EQ, they are probably
lacking in IQ as well?
Compiled by cracked.com, here are some of the reasons why some people are dumber than they should be:
Long meetings not only waste your time, they are a brain drain
Here's a reason to give your boss on why long meetings should be abolished - they make everybody involved dumber.
"You
may joke about how committee meetings make you feel brain dead, but our
findings suggest that they may make you act brain dead as well," said
Read Montague, director of the Human Neuroimaging Laboratory and the
Computational Psychiatry Unit at the Virginia Tech Carilion Research
Institute.
His study found that people perform less well on IQ
tests directly after spending time in small social groups than they did
when they were alone.
And if their performance was publicly revealed and ranked among their peers, they performed even worse.
It
is theorised that this is as being in the presence of someone whom you
think is smarter than you triggers debilitative cognitive responses by
making us act stupid because we feel stupid.
Brain scans revealed
that just being reminded of how the rest of group were scoring lit up
parts of the brain responsible for fear, anxiety and emotional response.
Being around the fairer sex
How about this? Just being around a beautiful woman, or even mentioning her name, can make men more stupid.
In 2009, a study demonstrated that after a short interaction
with an attractive woman, men displayed poorer performance in mental
tasks. The more beautiful the woman, the stronger the effect.
That's
not all. A more recent study showed that even the mere anticipation of
interacting with a woman is enough to impair the cognitive abilities of
men.
Researcher Sanne Nauts and her team from Radboud University
Nijmegen in the Netherlands had participants take part in a cognitively
demanding test.
During the test, they were told that a person with either a male or female name would be watching them through a webcam.
The
participants knew nothing of the invisible "watcher", other than his or
her sex. But just knowing an invisible woman was watching them was
enough to severely impact their performance.
In another experiment, the researchers decided to tell the participants that they would be watched by a woman
before they took the test.
In
reality, the participants never took the test, but took another
cognitive test to measure their current level of mental function.
Researchers found that just the anticipation of being watched by a woman
was enough to make the men score terribly.
Interesting enough,
both studies found that this effect only applies to men. Women
apparently are not made dumber by interacting with men.
Jetlag gives you permanent brain damage
Jet setting around the world may sound glamorous, but what if the cost is your brain cells?
A study conducted to investigate the effect of flying on Indian
male and female flight attendants (FAs) found that a whopping 67.47 per
cent of FAs who fly more than 10 years suffer from memory loss.
The
paper, published in 2007, found that stress, loss of memory and
headaches appeared to share the same etiology such as hypoxia (the
deprivation of adequate oxygen supply to body parts), jetlag and
irregular sleep.
Another study, this time conducted at the
University of California, Berkeley, found that hamsters subjected to
extreme, chronic jetlag had about half the normal rate of new neuron
birth in a part of the brain, by as much as 50 per cent.
These animals, when later tested in learning and memory, performed poorer than the control group hamsters.
It
wasn't that the hamsters were sleep deprived. The two groups of
hamsters slept the same total number of hours, but one group had their
hours screwed up by sleeping at times completely unrelated to their
external environment.
The most frightening point is.. it is permanent.
Or
at least a long term problem. The learning and memory problems remained
even after the hamsters were put back on a 28 days back-to-normal
schedule.
Getting spanked by your mom
Mothers beware:
Sparing the rod may spoil the child, but spank your children and you
risk giving them long-term developmental damage.
According to research done by the University of New Hampshire, children who are spanked have lower IQs worldwide.
The
IQs of children aged two to four who were not spanked were as much as
five points higher four years later than the IQs of those who were
spanked.
"How often parents spanked made a difference. The more
spanking, the slower the development of the child's mental ability. But
even small amounts of spanking made a difference," said Straus Paschall,
senior research scientist at the Pacific Institute for Research and
Evaluation.
One reason as to why hitting a child may knock off IQ
points is that corporal punishment is extremely stressful, and can cause
post-traumatic stress symptoms, such as the child being fearful that
terrible things are about to happen and being easily startled.
This makes children more aggressive and antisocial, and can cause cognitive impairment and developmental difficulties.
Being fat makes you mentally slow
It may be a
controversial point to make, but science says that being obese not only
makes you physically unattractive, it also makes you dull in the attic.
A study has found that children three years old and younger who
stuff themselves with foods high in fats, sugars and processed foods
grow up to have a lower IQ, while those who eat a healthy diet end up as
smarter adults.
This is as the brain is believed to be growing at
its fastest rate during the first three years of life, and depriving
the brain of proper nutrients at this crucial period may have serious
ramifications later on in life.
Eating junk food is not only
linked to duller minds in childhood. Other studies have found that diet
in adulthood also affects mental performance in later years.
A
study, published in a 2003 issue of the International Journal of
Obesity, found that obesity works independently, as well as hand in hand
with other risk factors, to cause a decline in thinking ability,
especially for memory and learning.
Those with a "body mass index" of 30 or more performed significantly worse in tests of mental ability, the Boston study found.
It was suggested that obesity may damage brain function by making it harder for blood to reach the brain.
Other
studies have speculated that the reduced cognitive abilities of obese
people might be due to their resistance to sugar (caused by prolonged
exposure to excessive sugar), which affects the health of brain cells.
Living in a bustling city
If you are living in Singapore, you are by definition living in a city - and it's likely to be screwing up your brain.
Researchers from the University of Michigan found that just being in an urban environment can impair our basic mental processes.
After
spending just a few minutes in a crowded city street, your memory
capabilities are affected and the mind suffers from a drop in
self-control.
In a series of psychological tests, subjects who
walked through a city ended up in a worse mood and scored poorly in
attention and working memory tests.
The reason is simple: A city,
with a concentration of activity in a small area, is a brain drain. The
mind has to pay attention to so much stimuli and irrelevant things that
what results is an overload on the brain's processing power.
This
is in contrast to looking at nature and wide areas of greenery, which
has been proven to be beneficial to the brain. One study has
demonstrated, for example, that hospital patients recover more quickly
when greenery is visible from their hospital windows.
Living in a bustling city
If you are living in Singapore, you are by definition living in a city - and it's likely to be screwing up your brain.
Researchers from the University of Michigan found that just being in an urban environment can impair our basic mental processes.
After
spending just a few minutes in a crowded city street, your memory
capabilities are affected and the mind suffers from a drop in
self-control.
In a series of psychological tests, subjects who
walked through a city ended up in a worse mood and scored poorly in
attention and working memory tests.
The reason is simple: A city,
with a concentration of activity in a small area, is a brain drain. The
mind has to pay attention to so much stimuli and irrelevant things that
what results is an overload on the brain's processing power.
This
is in contrast to looking at nature and wide areas of greenery, which
has been proven to be beneficial to the brain. One study has
demonstrated, for example, that hospital patients recover more quickly
when greenery is visible from their hospital windows.
Breastfeeding can increase a child's IQ by 3 to 8 points
Yes, breastfeeding is tied to kids' brain power.
In
a 2011 study from the UK, kids who were breastfed as babies had higher
scores on tests of vocabulary and reasoning at age five than those who
weren't breastfed.
"There are essential fatty acids in breast milk
which are good for cell development and brain development in
particular," said Amanda Sacker, one of the authors of the new study
from the Institute for Social and Economic Research at the University of
Essex.
She added that there also could be differences in hormones
and growth factors which are lacking in formula. A third possibility is
that the act of cuddling during breastfeeding sessions may be
translating to better smarts in the future.
This adds on the the
host of benefits science has found in favour of breastfeeding, including
lower infection risks, stronger lungs and less asthma.
The World
Health Organisation (WHO) recommends that mothers exclusively breast
feed their babies for the first six months of their lives, and continue
to do so until at least two years of age.
Worried about your
intellectual superiority now? No fear, click through the gallery below
to find out how you can gain back some smarts.