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The information that we have about the visual world, and our perceptions of objects and visual events in the world, depend only indirectly upon the state of that world. They depend directly upon the nature of the images formed on the backs of our eyeballs, and these images are different in many important ways from the world itself.
T. N. Cornsweet1970
For an organism to operate effectively within any environment, natural or artificial, it must be able to get information about that environment using its senses. Likewise, the organism must be able to act on that information and to perceive the effect of its action on the environment. How people perceive environmental information is of great importance ...
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