Symmetry Perception:
Faster than you think

The pictures below have pixels randomly colored either black or white. If you have Netscape 3 or Internet Explorer 3, you can see them change as you pass your mouse over them. Each picture has two versions: a random pattern, and a pattern with symmetry around a vertical central axis.

How long does it take to see symmetry? 1/2 second? 1/10second?

Test yourself:

( QuickTime for Windows or Mac and QuickTime plugin required)

1/5 sec1/2 sec (22 KB) 1/7 sec1/10 sec (33 KB)

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The eye page

Tyler lab

S-K Eye Research