PSYCO367 Chapter Notes - Chapter 7: Decision Points, Affordance, Posterior Parietal Cortex
2 May 2014
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Document Summary
The moving observer and information in the environment. Optic array: the structure created by the surface, textures, and contours of the environment, and he focused on how movement of the observer causes changes in the optic array. Optic flow: the movement of elements in a scene relative to the observer: movement of the surroundings. Optic flow has two characteristics: the flow is more rapid near the moving observer, there is no flow at the destination toward which the observer is moving. Gradient flow: the different speed of flow (fast near objects) (slow farther away objects) The gradient of flow provides information about the observers speed. Focus of expansion: absence of flow at the destination point. Invariant information: property that remains constant under different conditions. Optic flow provides invariant information because it occurs no matter where the observer is, as long as they are moving. Self produced information: an observers movement provides information that the observer uses to guide further movement.
