This was emailed to me.

Can't stop staring.

Seems legit.
My wife and I have watched it in opposite directions.

http://lateralaction.com/articles/left-brain-or-right/

80% clockwise for me.

 

No doubt about it that she's spinning clockwise. Creativity or not, I find it to be common sense lol. and I am definitely left brained so I think this is garbage.

 

The interpretation may be garbage, but it does appear to spin opposite after a while.

So far all the initial looks are CW.

My neighbor lady took 10 seconds to see a reversal.

I can't stop looking.

 

I see 90% CCW. Only occasionally does the image spin CW.

 

I see 90% CCW. Only occasionally does the image spin CW.

Ok, that's 1 for CCW!

I think I found the method (for me), to change at will.

 

The shadow on the bottom skews the spin. Cover the shadow and she only spins clockwise for me.

 

I had given this a shot in the past. I never managed to change the rotation direction; she always spins CCW, looking from above, for me.

 

The shadow on the bottom skews the spin. Cover the shadow and she only spins clockwise for me.

Nope. Still spins CCW.

 

If I concentrate, I can change the direction I see.

 

Some interesting reading on the Wikipedia page:
http://en.wikipedia.org/wiki/Spinning_Dancer
The PDF in the references is also good, I didn't notice that the shadow is only correct for anticlockwise rotation.

 

Keeps switching back and forth for me depending on what personality I am letting drive my mental bus.

 

I can reverse it like I don't know what the problem is.

 

Is that thing worth all the fuss?

Had you the real dancer in front of you, would you be confused? Almost never.

 

The optical illusion is intriguing. It is what makes it so fascinating. It is like you are feeling the circuits in your minds fighting over it.

 

Is that thing worth all the fuss?

Had you the real dancer in front of you, would you be confused? Almost never.

Yes it definitely is worth the fuss. So much of what we see is only what we think we see. For example, you cannot see anything you are directly looking at: that's a well known hole in your retina. But your brain fills in that little detail for you.

Here you get to play with the workings of some of your hardware.

 

She might be fun to look at but what's her personality like?

 

12 rotations CW...12 rotations CCW. Then repeats.

Speaks more to the time it takes someone to decide. Apparently I made the decision quickly when it started in the CW mode.

 

Initially, the dancer always starts off CCW, but sometimes changes rotation when I look away from the screen then back again. I've tried to focus on a particular point, such as the thigh on one leg, or the toes on the other, the head, hands etc.
There's no discernable pattern which I can attribute to a change in direction, but the shadow on the floor does seem to have an influence if I make a conscious effort to take notice of it.

 

If I cross my eyes and slightly blur the image I can get her to be going both ways at once.

One eye she goes CW the other she goes CCW.

 

I found that I can change directions by watching the shadow meet the pivot foot and kicking foot shadow left or right.

There is only one true direction, as she pivots on left or right foot.

One direction here feet are backwards. (big toe)