I think it's legit as some optical illusion, but the left brain/right brain thing is probably BS. They know that the left side of the brain is more involved in language, the right side of the brain is more involved in mathematical and spatial stuff, women use more of the right side of their brain in language tasks, the left side of the brain controls the right side of the body and vice versa, visual information from the right side is processed on the left side and vice versa, left handers are more likely to use the right side of their brain for language and the trend is reversed for gays: gay right handers are more likely to have language in the right side of their brain and gay left handers are less likely to have language in the right side of their brain. I don't think they know a lot more than that. The whole thing about one side of the brain being creative is probably bogus. As far as the image goes, I can't get the image to change by my own efforts. For me, it changes on its own.