"Perception is intelligent activity. Its not just a matter of mechanically extracting information from the stimulus out in the environment. Rather, the perceiver has to actively engage in problem solving activity bringing his or her knowledge, expectations, and beliefs to bare on the problem of figuring out what the objects in the world are, where they are, what they are doing, and what we can do with them. That is the intelligence of perception and that is the general thrust of the constructivist view."
