I see nips!! My old biology teacher showed us this. Said there might be some correlation between which way you see the girl spinning at first and your use of left brain vs. right brain or something. I didn't really buy it. But, kind of interesting
The colors on each leg are different; hence the illusion. Look at the leg that is spinning on the left image and the right image.. they are not the same color. Game over
<br> That has nothing to do with it. The OP posted a pretty bad version of this. The original pic has only one lady, and I think it's solid grey. I'll try and find it
Yeah, the original version has just the middle image. I think this version exists because once people see the dancer turning one way, it can be hard for them to see it spinning the other way. With this version, if you look at the left image, the middle one seems to be spinning clockwise whereas if you look more towards the right image, the middle dancer appears to be spinning counter-clockwise.
Yeah, you got it Cannonball. Here's one of the many articles on it: http://www.illumine.co.uk/resources/brain-fitness/spinning-lady.html
IT'S A TARP! For the first two minutes all I could see was clockwise. Then all of a sudden she's going anti clockwise and I can't change it back. I need another beer.
I know, lies! The image resets every 60 sec or so and changes direction by itself. Not cool to mess around with people's heads at this hour lol.
Yes, we've gone though this one before. I was looking at one another illusion the other day that I thought was very interesting. The squares marked A and B are the same shade of gray. I went thought a paint program to manually verify that the colors are same as well. The explanation for this is contained here: http://web.mit.edu/persci/people/adelson/checkershadow_illusion.html
This one is better. <object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/-khCAf1tdCY&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/-khCAf1tdCY&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
Actually the illusion is the result of the lack of depth and shadow. The two frames on each side with the colors demonstrate that effect. A black silhouette rotating without depth is hard to distinguish. Also the direction is determined by which feature you focus on, the leg, the torso or the head. Each frame of the animation will have two possible directions either you see the leg in front or spinning behind the other. Again because there is no depth, the poses are the same at each interval. Stare at it long enough and you will realize there is no uniform directional movement, just a string of frames depicting different poses that one has to perceive direction based on the bidirectional nature of the illusion.
