Human intelligence is not only calculated by academic achievements, but also through certain body parts. Here are four parts of the human body that can reveal your intelligence level.
A study by researchers from Brown University and Princeton University suggests that taller people may earn more money than short people because they’re smarter. The authors used government data sets that collected the height, weight, intelligence, educational experience, and salaries of people born in the U.S. or the U.K. in 1958 and 1970 from their birth into adulthood.
The results of their thorough analysis showed that the people who were tall as kids performed significantly better on cognitive tests. Plus, taller people tended to work in higher-paying occupations that required greater intelligence and more advanced verbal and numerical skills. Researchers still remain perplexed by the connection between height and intelligence, but some suspect genetics or early childhood care could play an influential role in the brain.
Your dominant hand may not automatically indicate you’re a genius, but it could have its advantages. In fact, lefties may have the upper hand (no pun intended) in reaping more cognitive benefits than righties. A small study from the University of Athens took about 100 university students and graduates, half left-handed and half right-handed, and gave them two cognitive tests.
One challenged participants to make a trail through a batch of circles as quickly as possible and the other included letter-number sequencing. The lefties performed better than the righties on both tests, which suggested that they had a stronger working memory and mental flexibility. Some experts suspect these cognitive abilities may be because left-handed people can use both sides of their brain more readily to process information.
High body fat can have an impact on many aspects of your overall wellbeing, from your blood pressure to your heart health—and possibly your cognitive function. In a five-year study of more than 2,200 adults, researchers found that people with a body mass index (BMI) of 20 or less (the healthy BMI range is 18.5–24.9) could recall 56 percent of words in a vocabulary test, while obese participants (a BMI of 30 or higher) only remembered 44 percent.
What’s more, the memory recall of the latter subjects dropped to 37.5 percent when they were retested five years later. Dr. Maxime Cournot, the study’s lead author, theorized that fat hormones could damage brain cells. “Another explanation could be that since obesity is a widely known cardiovascular risk factor, due to the thickening and hardening of the blood vessels, that the same happens with the arteries in the brain,” Dr. Cournot told the Telegraph.
No one likes to be called a “big head,” but literally having a big head may actually make you smarter. A study published in Molecular Psychiatry gave more than 500,000 people in the U.K. cognitive and physical assessments while also examining samples of their blood, urine, and saliva. Researchers found that people who had larger heads as infants had higher scores on verbal-numerical reasoning tests and were more likely to get a college degree.
“These results,” they wrote, “should stimulate further research that will be informative about the specific genetic mechanisms of the associations found here, which likely involves both protective and detrimental effects of different genetic variants.
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