Right Brain or Left
Michael Kordahi posted an article about an optical illusion test.

Which way is the woman turning - clockwise or counter-clockwise? Click here to find out what it reveals. What we call counter-clockwise some parts of the world calls anti-clockwise BTW
Apparently a lot of people can see her moving in either direction at will. No such luck for me though.
October 10th, 2007 at 4:57 pm
Clockwise. I can’t see it any other way. And I spent about 5 minutes trying.
PS - Is she wearing any clothes?
October 10th, 2007 at 10:06 pm
Both, pretty much at will though it is easier to make it go clockwise.
P.S. - No, that girl is naked.
October 10th, 2007 at 10:19 pm
BTW, I’d consider myself *very* left-brained. I simply can’t make her go counter-clockwise.
I’m fairly convinced that it’s all a ploy to get people to stare at a nude figure for as long as possible.
You can trace an ‘arc’ formed by, say, her hand, and it’s *clearly* going clockwise. There’s no other way to view it.
October 10th, 2007 at 10:36 pm
Whoa! Just got it.
The key is to stare *solely* at the center, like her chest. I have my eye like 2″ from the monitor covering the whole image. And I can get it to reverse that way. And then I can back up and watch it go counter-clockwise. For a while. And then it suddenly switches.
January 4th, 2008 at 7:14 pm
Wow are you kidding me?
January 25th, 2008 at 6:58 am
I couldn’t understand some parts of this article Right Brain or Left, but I guess I just need to check some more resources regarding this, because it sounds interesting.