Tuesday, April 01, 2008

Visual Hemispheric Dominance?


The enclosed is presented as an exercise for observing and reducing visual hemispheric dominance.

Lou Dobbs, you listening?





The spinning girl was an optical illusion illustrating something entirely different about the human visual system than what the newspaper article which popularized it advertised. The spinning girl is a form of the more general spinning silhouette illusion.
The image is not objectively “spinning” in one direction or the other. It is a two-dimensional image that is simply shifting back and forth. But our brains did not evolve to interpret two-dimensional representations of the world but the actual three-dimensional world. So our visual processing assumes we are looking at a 3-D image and is uses clues to interpret it as such. Or, without adequate clues it may just arbitrarily decide a best fit - spinning clockwise or counterclockwise. And once this fit is chosen, the illusion is complete - we see a 3-D spinning image.

By looking around the image, focusing on the shadow or some other part, you may force your visual system to reconstruct the image and it may choose the opposite direction, and suddenly the image will spin in the opposite direction.
Keep all these things in mind as we view and study the unfolding political and economic spectacle.