y62 - Chapter 6 Perceiving the World Table of Contents Exit...

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Chapter 6 Perceiving the World Table of Contents Exit
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Perception: Some Key Terms Definition: How we assemble sensations into meaningful patterns Size Constancy: Perceived size of an object remains constant, DESPITE changes in its retinal image size Native Perception: A perceptual experience based on innate processes Empirical Perception: A perception strongly influenced by prior experience Shape Constancy: The perceived shape of an object unaffected by changes in its retinal image Brightness Constancy: Apparent brightness of an object stays the same under changing lighting conditions Table of Contents Exit
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Fig. 6.1 Shape constancy. (a) When a door is open its image actually forms a trapezoid. Shape constancy is indicated by the fact that it is still perceived as a rectangle. (b) With great effort you may be able to see this design as a collection of flat shapes. However, if you maintain shape constancy the distorted squares strongly suggest the surface of a sphere. (From Spherescapes-1 by Scott Walter and Kevin McMahon, 1983.) Table of Contents Exit
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Perceptual Grouping Figure-Ground Organization: Inborn; part of a stimulus stands out as a figure (object) against a plainer background (ground) Reversible Figure: Figure and ground that can be reversed Table of Contents Exit
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Fig. 6.2 A reversible figure-ground design. Do you see two faces in profile, or a wineglass? Table of Contents Exit
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Gestalt Principles of Organization Nearness: Stimuli that are near each other tend to be grouped together Similarity: Stimuli that are similar in size, shape, color, or form tend to be grouped together Continuation, or Continuity: Perceptions tend toward simplicity and continuity Table of Contents Exit
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Fig. 6.3 How we organize perceptions Table of Contents Exit
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Gestalt Principles of Organization (cont.) Closure: Tendency to complete a figure so that it has a consistent overall form Contiguity: Nearness in time and space; perception that one thing has caused another Common Region: Stimuli that are found within a common area tend to be seen as a group Table of Contents Exit
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Fig. 6.5 A challenging example of perceptual organization. Once the camouflaged insect (known as a giant walkingstick) becomes visible, it is almost impossible to view the picture again without seeing the insect. © E.R. Degginger/Animals Animals Table of Contents Exit
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Depth Perception Definition: Ability to see three-dimensional space and to accurately judge distances Visual Cliff: Apparatus that looks like the edge of an elevated platform or cliff Depth Cues: Features that supply information about distance and space Monocular Depth Cue: Depth cue that can be sensed with one eye Binocular Depth Cue: Depth cue that can be sensed with two eyes Table of Contents Exit
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Muscular Cues for Depth Perception Accommodation: Bending of the lens of the eye to focus on nearby objects Convergence: Binocular cue; when you look
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This note was uploaded on 02/11/2011 for the course PSY 2012 taught by Professor Dobson during the Spring '08 term at University of Florida.

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y62 - Chapter 6 Perceiving the World Table of Contents Exit...

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