Study this video and keep track of how many objects you can see change.

I am pretty sure on my first view I got zero! Tweet your score but also how it feels, and what this suggests about our perception. What do you miss seeing around you in the world? If you are feeling really intrepid, can you reproduce this effect on your own (that’s way more than a daily create calls for!).

The Changing Room Illusion took second prize for the Illusion of the Year (2021) and thanks to Jason Kottke for posting this! Explore some of the other illusions at

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