The different ways people perceive the Müller-Lyer illusion likely reflects lifetimes spent in different physical environments. American children, for the most part, grow up in box-shaped rooms of varying dimensions. Surrounded by carpentered corners, visual perception adapts to this strange new environment (strange and new in terms of human history, that is) by learning to perceive converging lines in three dimensions.
When unconsciously translated in three dimensions, the line with the outward-feathered ends (C) appears farther away and the brain therefore judges it to be longer. The more time one spends in natural environments, where there are no carpentered corners, the less one sees the illusion.
The above is one of the few posts from a former blog site that i wanted to save, and lookity what i found about an hour and a half later (click 'explores' for full article):
David Weisman explores how Buddhism gets the brain right:
Neuroscience tells us the thing we take as our unified mind is an illusion, that our mind is not unified and can barely be said to “exist” at all. Our feeling of unity and control is a post-hoc confabulation and is easily fractured into separate parts. As revealed by scientific inquiry, what we call a mind (or a self, or a soul) is actually something that changes so much and is so uncertain that our pre-scientific language struggles to find meaning. Buddhists say pretty much the same thing. They believe in an impermanent and illusory self made of shifting parts. They’ve even come up with language to address the problem between perception and belief. Their word for self is anatta, which is usually translated as ‘non self.’ One might try to refer to the self, but the word cleverly reminds one’s self that there is no such thing. |
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