Click on the link below and see if the dancer is turning clockwise or counter-clockwise (the first direction you see is what counts).

http://www.news.com.au/heraldsun/sto...81-661,00.html

Now, let's put some IT meaning into it :

If you see her rotating counter-clockwise, you think more as a developer.
If you see her rotating clockwise, you think more as an end-user.

Umm... Those Aussies are nuts.

If you look at it, it's clockwise; you can see her reflection in the floor, so we know the viewpoint is substantially above the floor.

When her extended foot is moving to the right, it crosses center about half-way up to her knee; when it crosses to the left, it's at her ankle... perspective takes it from there.

I whipped something up in the GIMP from 4 frames...

There's real geometry like this, and their test is completely wrong, as it claims right-brained people will do an analysis like that. I'm major left-brained, in case I didn't demonstrate that above, but my eyes know geometric perspective, and my brain can prove it.

Oh, and my arrows are terrible; apologies, but it's yet more proof I'm not a right-brained idiot artist.

Someone showed me this a couple months ago. I found I could make the dancer switch directions at will. But it seems that a lot of people who have studied perception dismiss this as just an optical illusion and dont feel it really has much basis in determining brain "sidedness"....that's what I read anyway. Maybe the skill comes from squinting at a 4" screen all day

I first saw her turning counter-clockwise, but if I looked away, and moved my finger clockwise in the air in front of me, then looked again at the animation, she was spinning clockwise.

Oh, and... BOOBIES.

Yeah, that's fun. Switch her direction every time she hits the midpoint.

True and a nice arse too...maybe the point isn't the optical illusion, but the subconscious fixation with her shape...hadn't thought about that actually til now.

Turning both ways = Bi-brainual

I don't get it. I only see her rotating clockwise and don't see how, based on the changing images, she could even remotely be perceived as rotating the opposite way...???

Or that fact the dev designed the model with nipples

Texrat fails at the optical illusion.

/me stamps a big red "F" on Texrat's forehead.