Perception includes the selection, organization, and interpretation of external information coming from the senses up to a complete representation of a stimulus. The extraction of elementary features within primary cortical receiving areas in each sensory modality is called low-level perception. It is domain general such that the same mechanisms are involved in processing social and nonsocial information. At a higher level of integration, there is pattern construction in which elementary features (e.g., of visual or auditory stimuli) are grouped into basic configurations. Visual motion perception depends on information integrated at various levels of the processing hierarchy: first-order motion is perceived in primary areas, while second-order motion requires a network of associative regions. High-level perception involves the matching of constructed configurations with memorized templates as the hierarchy of perceptual processing becomes gradually more domain specific. In...
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