Can YOU name these 10 upside-down celebrity faces? New study provides clues about why the ‘inversion effect’ is so difficult for our brains

• Faces are harder to recognize – is that due to evolution or learned behavior?
• That was the goal of the researchers who studies severely disabled man 
• READ MORE:  Brazilian man with upside-down head who inspired the research

When you become familiar with someone, you start to recognize their face pretty quickly – but if you see them upside down, studies show it’s harder to tell.

Known as the face inversion effect (FIE), scientists have long been trying to work out whether it’s an evolutionary or learned behavior.

‘Face processing has received a lot of research attention and it’s a…