PSYC 213 Lecture Notes - Jeremy Hinzman, Simple Features, Computer Data Storage
10 Mar 2014
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Document Summary
When people pay attention to some specific piece of information, they fail to pay attention to other elements of the environment, greatly limiting our perception. From the phenomenon of change blindness, we can realize that we don"t see the world in detail, apart for our foveal vision. Attention limits vision, which shows quite clearly that vision is an active and constructive process. Perceptual mechanisms have shortcuts; they often estimate quickly what the environment should be like, constructing our perception. Our visual systems make many assumptions about how the world is. For instance, our brain assumes that the world is lit from above (the sun) and that the world is stable (things don"t change size as they move away or toward us, for example). We have dominant representations of the world: for instance, stairs go upwards. There are two main approaches to vision theories: Bottom-up: we build our perception from basic features that are available in our environment.
