Hehe, that's one intresting picture. I couldn't for the sake of my life figure out how to make her spinn counter-clockwise but after having read the comments I managed with alittle concentration. But moment I let go of my focus she starts spinning clockwise again.

{ToT}Strafe

Thailand7026 Posts

October 12 2007 17:15 GMT

#223

okay can do it

himurakenshin

Canada1845 Posts

October 12 2007 17:18 GMT

#224

the mistake people are making is that the picture isn't 3d, its 2d. Hence at each point, her back could be to you, or her face could be to you. Once you see that, you can make it turn any way you want.

oddeye

Canada716 Posts

October 12 2007 17:21 GMT

#225

what the fuck, I can't see it counter-clock wise and yet I always thought I was left brained. O well.

-WGT-Stars-

United States888 Posts

October 12 2007 17:21 GMT

#226

at first i saw her counter-clockwise and then i blinked a couple times and now shes clockwise and then i blinked again and shes counter >.> Can there be a both option?

wXs.Havok

Argentina529 Posts

October 12 2007 17:22 GMT

#227

BAH it changes ........... sux

Rev0lution

United States1805 Posts

October 12 2007 17:26 GMT

#228

i found an easy way to change from clock to counter wise

[SPOILER] look at the shadow of her feet, it doesnt go in a circle it goes like a pendulum. Once you get the motion of the shadow you can change the direction of her body :D[SPOILER]

-WGT-Stars-

United States888 Posts

October 12 2007 17:29 GMT

#229

Or hit refresh like 8 times and she will change ;D

Rev0lution

United States1805 Posts

October 12 2007 17:30 GMT

#230

the spoilers dont work??

[spoiler] lol [spoiler]

boghat

United States2109 Posts

October 12 2007 17:32 GMT

#231

Holy shit that's fucked up when you first get it to change.

I first saw her going counter-clockwise for awhile but I was able to get it to change to clockwise.

lilsusie

3861 Posts

October 12 2007 17:34 GMT

#232

i cant see her going any way but clockwise. right brain all the way!

ATeddyBear

Canada2843 Posts

October 12 2007 17:36 GMT

#233

WTF, in class I saw her going counter-clockwise... back at res she's going clockwise O.o

boghat

United States2109 Posts

October 12 2007 17:37 GMT

#234

It's fun changing her back and forth without looking away. I bet it's good exercise for the brain too. If you want to change you have to really try, you can almost feel it in your head when you make the change. At least it seems that way for me.

Maybe for some people it's easier to make it change and it does it on its own, I seem to have to try harder to do it.

-WGT-Stars-

United States888 Posts

October 12 2007 17:39 GMT

#235

its [/spoiler] LOL >.<

SoleSteeler

Canada5449 Posts

October 12 2007 17:42 GMT

#236

I can see it both ways... I saw it counter-clockwise originally though

boghat

United States2109 Posts

October 12 2007 17:43 GMT

#237

I always seem to first see it going counterclockwise though. I can change it but when I first look it always goes counter.

[edit] nevermind I can see it first both ways now. Just takes practice. I was getting pretty pissed too.

mikeymoo

Canada7170 Posts

October 12 2007 17:49 GMT

#238

Clockwise, as all my engineering diagrams are drawn with that convention.

Mandalor

Germany2362 Posts

October 12 2007 18:00 GMT

#239

I saw counter-clockwise first, but I can see her turn both ways.
Try this: Just look at her left foot and imagine it being a clock. Now think of it clockwise and look at her whole body (I love the fact that this "scientifical test" uses a naked woman ^^), she will be turning clockwise to you. Now do it the other way round and you see her turning counter-clockwise.
Funny image

Funchucks

Canada2113 Posts

October 12 2007 18:09 GMT

#240

Consider a silhouette made by parallel beams of light on a flat screen, of the dancer turning clockwise (as imagined from above), turning to her right. The parts of her body on the right side of the image will be moving toward you, and the parts of her body on the left side will be moving away.

Now consider the silhouette of the same dancer performing the same action, but with the light source and flat screen rotated 180 degrees, a perfect half-turn, around the dancer. She is still turning to her right, still clockwise as imagined from above. The parts of her body on the right side of the image will still be moving toward you, and the parts on the left will still be moving away.

This silhouette will be flipped left-to-right compared to the first one, but otherwise identical.

Now imagine you are watching the dancer through a mirror, not a silhouette but directly seeing her. She would look the same as a dancer turning to her left. The parts of her body on the right side of the image would be moving away from you, while those on the left would be moving toward you.

Now imagine watching the original silhouette through a mirror. The direction of her rotation should be reversed by the mirror, but the mirrored silhouette is identical to the silhouette from the opposite side. Although one image is derived from the dancer facing you then turning to her left, while the other image is derived from her facing away then turning to her right, they are identical.

Since, a parallel-light silhouette does not allow you to distinguish between a mirrored image or an opposite-side silhouette, you can't determine which side you're watching from unless there is a known asymmetry. For instance, if her left hand was a lobster claw and you knew it, when her breasts faced right, you could judge that the lobster claw was behind her and determine the direction of her spin from that. If the lobster claw appears next to the right (following the breasts), she is turning to her right, if it appears next on the left, she is turning to her left (preceding the breasts).

For a perspective view rather than a parallel-light silhouette, the parts of her body will change size as they move closer or farther. If her hand grows, you know it is moving toward you. If her foot shrinks, it is moving away. This would also be a way to judge the direction she is turning.

I believe that there is a perspective cue in this image. Notice that the image is being moved up and down so that her lifted leg appears to be holding at the same height. I think her lifted leg appears longer when it is closer, so the toes are lower, and the body (most noticably the supporting foot) is raised to hide this and confuse the eye.

So when the feet are closest together vertically, the lifted leg appears longer, is closest to the camera, and is therefore in front. While when they are farthest apart vertically, the lifted leg appears shorter, is farthest from the camera, and is therefore in back.

By this reasoning, she is turning to her right, or clockwise from above.

I think this is only a perspective view rotation which has been altered to seem more like a parallel-light silhouette, and if you see her turning to her left, you're missing visual cues that conflict with this interpretation. But I'm not terribly certain.

Any counterarguments?