People with high IQs have stronger basic perceptual skills, research finds.
People with higher IQs find it easier to tell which way an object is moving.
They are also better at blocking out background information to make their judgement.
The reason is that the brains of people with higher IQs work faster.
It helps underline that high IQ is about more than just solving puzzles or making the ‘right’ decision.
For the study, people had to judge lines moving across a screen.
Here is an example:
The results showed that the more intelligent people were, the quicker they picked up the direction of the drifting lines.
Dr Duje Tadin, co-author of the paper, said:
“Because intelligence is such a broad construct, you can’t really track it back to one part of the brain.
But since this task is so simple and so closely linked to IQ, it may give us clues about what makes a brain more efficient, and, consequently, more intelligent.”
However, sometimes people were shown small images, sometimes large.
What this shows is that people with high IQs are better at suppressing background information.
Mr Michael Melnick, study co-author, said:
“Being ‘quick witted’ and ‘quick on the draw’ generally go hand in hand.
From previous research, we expected that all participants would be worse at detecting the movement of large images, but high IQ individuals were much, much worse.”
The study may help researchers identify the neural correlates of intelligence, said Dr Tadin:
“We know from prior research which parts of the brain are involved in visual suppression of background motion.
This new link to intelligence provides a good target for looking at what is different about the neural processing, what’s different about the neurochemistry, what’s different about the neurotransmitters of people with different IQs.”
The study was published in the journal Current Biology (Melnick et al., 2013).