Right Brain v Left Brain
Which Way Is the Dancer Spinning? Some say both ways.
So far, she only spins clockwise for me.
My better half said clockwise at first, but then she focused on a different spot and the dancer changed direction. My oldest sees her change direction with no control over it. My youngest sees her spin clockwise, only.
Not sure if this is related, but I always have trouble seeing the hidden picture in Magic Eye's autostereograms but my wife has no trouble seeing them.
UPDATE: I got her to switch directions! I scrolled the picture down so I could only see the top of her head. When it switched directions, I scrolled the picture up and she was spinning counter-clockwise! It lasted for maybe 20 seconds and then she switched back to spinning clockwise. I was able to repeat the procedure. Weird, huh?
UPDATE: Okay, I can get her to switch directions now while viewing the whole image.
UPDATE: The Spinning Dancer and the Brain
When presented with stimuli that have two valid, mutually contradictory interpretations, your brain just picks one. Then, sometimes, it picks the other. We still don’t understand why this happens, or what role conscious efforts might play in this shift in perception. Many people are able to make the dancer shift directions at will, but the strategies I’ve seen almost always invoke a change of focus - I shift my attention to her feet, or scroll up and down, others look at her hands or to her side. (I’ve also seen lots of people talk about staring at her nipples, but none who report that it helps them see her change directions.)Heh.