Most qualified radiologists could not see the gorilla planted in this lung scan. Picture: Trafton Drew, Melissa Vo, and Jeremy Wolfe/Psychological Science Magazine Source: Supplied
WHAT can you see in this CT scan? Look closely. Especially in the top right hand corner. If you're not seeing a gorilla, don't worry because you're not alone.
According to the results of a new study, 83 per cent of radiologists failed to spot the animal, despite looking at the scan at least four times, on average.
Here's how the experiment worked, according to CBS News.
The 24 qualified radiologists were given lung CT scans, which each had about 10 nodules (abnormal spots), and were asked to find anything strange on the scans.
On the last one, the dancing gorilla - about 48 times the size of an average nodule - was placed in the scan.
The radiologists found the correct nodules 55 per cent of the time. But only 20 of them saw the gorilla, despite scrolling past it 4.3 times, on average.
"Researchers also determined by eye-tracking that radiologists spent 5.8 seconds looking at the scan with the gorilla, and out of the 20 radiologists who did not see the gorilla, 12 had looked directly at it," CBS reported.
Once the radiologists had been asked if they could see the gorilla, they could all spot it in the scan.
Apparently the radiologists were experiencing "inattentional blindness", which is a psychological phenomenon where when we're focussed on a certain task and our brains only register a specific part of what we see.
"And that makes it possible to not notice strange and usual things that might be in plain sight," CBS said.
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