Studies show that IQ scores have been steadily increasing over the last few decades. Part of this increase can be attributed to better schools and nutrition, but even well-educated and well-fed people do better solving puzzles than they did 50 years ago.
One likely reason? Video games. Lots and lots of people spend leisure time solving 3D mazes, intricate puzzles and logic problems, and doing other things that IQ tests challenge you to do.
Not that increases in IQ scores are necessarily good. But video games are changing our brains.
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