I had to search and search to find this webpage.
My husband and I played with this for quite some time, out of pure wonderment. I thought of it when I mentioned what my brain means to me on another thread, and thought you all might be interested, too.

http://itknowledgeexchange.techtarget.co...e-of-the-brain/

Even if you answer with an A or a B, initially, move your eyes away from the illustration and move them back. I found that if I moved them down to the verbage and read, "What? You don’t believe she could be spinning the other way? Show this to someone who thinks very differently than you do. Or better yet, get a couple of people to look at it at the same time." to look up again afterwards, the direction changed for a short period. My husband could see the image going counter clockwise simultaneously while I saw it going clockwise.... intermittently changing to vice versa. SOOOOO interesting!!!!!! The brain is amazing, simply amazing!!!!

Also, here is a link to trial runs on brain exercises/training, which we can all benefit from: http://www.lumosity.com/.

If anyone has brain exercises they can share, please do.... let's keep them alive and well. I hope sharing these links is ok in the forums... I have no connection to them.

Oh my gosh....how weird is that???? I saw her spinning clockwise, too, then blinked and she was going counter-clockwise. Our brains really are amazing!

I had to concentrate very hard to get her to spin counter-clockwise, and then she kept switching back to clockwise almost immediately.

She stayed counter=clockwise for me. But the gorilla. I did not even notice it when I was simply watching the kids in white t-shirts. I even watched it twice to make sure my count was correct.

ladyjane the same thing happened to me.

Great links gimster! Thanks so much for posting these.

mostlie counter clockwise then i saw it going clockwise , then it got stuck in my brain going counter clockwise and i couln't get her going the other way again pheeeew lol. furrowed brow and all...going cross-eyed now lol

i still waiting for video to load for the kids in whitre tea-shirts and the counting, thanks gimster.

that was fun i still stuck then i got convinced the video was swickiing not my perceptioon lol.

i got to intrested in the gorrila and forgott to count sigh...3 time's watched and still couldn't be sure of the final count sigh, lol
still funthoug lol

Counter clockwise for me, no mater how long I looked at her...