10/24/2026
83% of radiologists missed a gorilla. You just missed a few too.
In 2013, researchers at Harvard put a gorilla into a lung CT and asked radiologists to look for nodules. 20 out of 24 never saw it. Eye tracking showed most of them looked directly at it. It's called inattentional blindness, and it's not a radiology problem, it's a brain problem. Your attention is a spotlight, not a floodlight, and whatever's outside the beam basically doesn't exist. Which is why I hid a few gorillas in this video.
How many did you catch? Comment your number.
Study: Drew, Võ and Wolfe, Psychological Science, 2013.