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According to Treisman, the first stage of the Feature Integration Theory is the preattentive stage. Perception occurs automatically, unconsciously, effortlessly, and early in the perceptual process. During this stage, the object is analyzed for details such as shape, color, orientation and movement, with each aspect being processed in different areas of the brain. The idea that features are automatically separated appears to be counterintuitive; however, we are not aware of this process because it occurs early in perceptual processing, before we become conscious of the object.
The second stage of the Feature Integration Theory is the focused attention stage, where the individual features of an object combine in order to perceive the whole object. In order to combine the individual features of an object, attention is required and selection of that object occurs within a "master map" of locations. The "master map" of locations contains all of the locations in which features have been detected, with each ___location in the "master map" having access to the multiple feature maps. When attention is focused at a particular ___location on the map, the features currently in that position are attended to and are stored in "object files". If the object is familiar, associations are made between the object and prior knowledge, which results in identification of that object. In support of this stage, researchers often refer to patients suffering from [[Balint's syndrome]]. Due to damage in the parietal lobe, these people are unable to focus attention on individual objects. When given stimuli that requires combining features,
[[File:FITstages.png|alt=The stages of Feature Integration Theory.]]
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