Your pupil size could determine how smart you are, study finds
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People say you can tell a lot about a person just by looking them in the eye. Whether they are tired, happy or even excited, the eyes are revealing.
Our pupils in particular are perhaps the most visibly active parts of our eyes. They contract and expand based on a variety of environmental factors and stimuli. Damn, even the FBI examines pupil dilation to determine if a suspect lies during an interrogation.
But a recent study found that students, specifically their height, can be more than just indicators of your emotional state.
Scientists at the Georgia Institute of Technology (Georgia Tech) believe that the size of the pupil can determine a person’s level of intelligence.
Or rather, they discovered that the basic pupil size is “closely related” to the differences in intelligence between individuals.
According to the study published on Science Direct, people with taller pupils are more likely to have higher intelligence. Scientists used a series of tests on more than 500 Atlanta-area young people aged 18 to 35, divided into three categories: reasoning, attention and memory. They are all primarily designed to test each individual’s cognition with regard to external factors in their environment.
PICTURE: Gayatri Malhotra / Unsplash
Throughout the three studies, the group of scientists found that the difference in baseline pupil size between the participants who scored the highest and those who scored the lowest was noticeable with the naked eye. . No special equipment needed.
“When we discovered a relationship between basic pupil size and intelligence, we weren’t sure if it was real or what it meant,” the scientists explained in American scientist.
All the test conditions had to be perfect.
Using special eye monitors in the form of a high-power camera and a computer, scientists were able to capture the reflection of light on the pupil and cornea. During this process, participants were asked to stare at a blank computer screen for up to four minutes. This allowed scientists to record their basic pupil size – essentially the original or default size, excluding any stimuli.
Since pupils tend to react to bright light (by contracting), the scientists also made sure to keep the lab environment dark to preserve the real results.
In the “attention control” test, for example, participants were told not to pay attention to a blinking asterisk.
on one side of the computer screen. Instead, they had to quickly look across the screen and identify the letter that appeared. The letter would also disappear very quickly. PICTURE:
JD X / Unsplash
Even a quick glance at the blinking asterisk can prevent the participant from identifying the letter that appears on the other side of the screen. The pesky asterisk plays with peripheral vision!
The test found that people with larger base pupils were more likely to stay focused on letters, as opposed to blinking asterisks. Similar results were also obtained in the reasoning and memory tests.
Interestingly, the study also found that student height was negatively correlated with age, meaning that older participants tended to have smaller, tighter students.
What is the logic that determines the connection between pupil size and intelligence in the first place?
Pupil size is more specifically related to the locus coeruleus, which is a part of the brain responsible for the production of norepinephrine, a hormone that regulates processes such as perception, attention, learning, and memory. Alzheimer’s disease and attention deficit hyperactivity disorder (ADHD) have both been attributed to a dysfunctional
locus coerueleus. This part of the brain therefore plays an extremely important role in basic human function. PICTURE:
Fakurian Design / Unsplash However, the study sparked much controversy from fellow scientists. In fact, at the top of theirpublication
, scientists report that “other researchers have not been able to replicate our findings”, pointing out that external parties have only studied working memory capacity, not fluid intelligence (reasoning ).
The group of researchers also pointed out that the external studies had flawed methodologies, namely small baseline values of pupil size “down to physiological minimum”.
Do whatever you want with it.
So, do you have great intelligence, that is, great pupils?
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