If you see this picture moving
CLOCKWISE, that means you're using the
RIGHT PART of your brain more; that which governs intuitive, holistic, and random processes and is more visual and creative. You see the whole picture first then focus on the details after.
If you see the woman rotating
COUNTER-CLOCKWISE, that means you're more
LEFT-BRAINED: logical, analytical, and sequential. You tend to see the details first, then put them together to form a bigger picture.

By default, the first time I saw it was clockwise, which makes sense since I think I really am more right-brained. I honestly couldn't see it counter-clockwise and thought there was a trick to it, a counter and clockwise loop meant to decieve. But after opening the file on Apple Preview and analyzing the frame-by-frame, I can tell you it's all legit. It
really is how you choose to see it. I concentrated hard to get a 'feel' for the counter-clockwise flow by focusing on her legs, and egad... I finally saw it! Alas, I tend to lose it after a short time and I end up seeing it clockwise again.
Anyway, you guys try it. I'm particularly interested in how you lefties see it. Don't hurt your brains now... I know mine did.
Thanks to
Ghea for this interesting time-waster!