Paul Revere by Cyrus Dallin, North End, Boston



Sunday, September 26, 2021



The Thatcher Effect

The Thatcher Effect. This illusion highlights a flaw in how our brains work - we can't process an upside-down face because we are programmed to recognise faces the right way up. We create a mental map by recognising the face in pieces - eyes, mouth, and nose. So when we're presented with an upside-down, Thatcherised image, it's not processed properly. 

We know it's upside down, but because we so rarely encounter upside-down faces, we haven't evolved to interpret the expressions on them. The facial features look fine, so our brains assume the rest of the face is as well. That's why we don't see anything out of the ordinary until we turn the face the ‘right way’ up.


The Honorable, Esteemed And Distinguished Judge Dervish Sanders (A High IQ Bourgeois Elitist) said...

It's Adele Adkins. I recognized her right away.

Howard Brazee said...

Those who use laptops, pads, and phones can view that illusion better than I can.

KanaW said...

Good grief. I saved it to my drive, turned it over, and freaked out! It looks horrible! Fascinating how the mind worked on the upside down (sort of) one.