Interesting “ESP” site

The test

A friend sent me this. I was surprised at first, but then it didn’t take me too long to figure it out.

Here’s the test: http://sprott.physics.wisc.edu/Pickover/esp.html

Try it out (it will open in a new window), then return here if you can’t figure it out.

Scroll down for the solution.

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The solution

Hint: there is only one image for the “before” and only one for the “after.”

Scroll down for more details.

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Here’s the “before” image:

Here’s the “after” image:

Can you solve it now?

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Notice there are NO identical cards from the first set to the second.

Folks will focus so much on the card they want, that they don’t notice that none of the original cards are present.