Chapter 5 Part 2 - Perception (part 2) Today's topics Form...

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Today’s topics Form Perception Perceptual Organization Perceptual constancy Perception (part 2)
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Form Perception Chapter 5: Perception Form Perception First step: response of feature detectors What then? How do we combine the basic features into objects that we can recognize? Perceptual organization how we group small parts into larger units Gestalt psychology – an approach to psychology that is especially concerned with how we organize sensations into complete perceptions
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Gestalt Psychology Chapter 5: Perception Structuralism – Approach to perception in which our perceptions of objects are believed to be constructed simply by summing together the smaller individual sensations or features that make up the object – A belief that we could perceive complex objects by “taking inventory” of the features and “summing up” all of the individual components Gestalt psychology – Formed as a reaction to structuralism Gestalt basically translates to “entire figure” or “an organized whole” – Rejected idea that perceptions are simply built up by adding together all the individual sensations – Proposed that the brain creates a coherent perceptual experience that is more than the sum of the individual parts
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Perceptual Organization Chapter 5: Perception Sometimes our perception of an entire stimulus has qualities that don’t exist in the individual parts. Gestalt psychologists believed that, in perception, the whole is more than the sum of its parts. EXAMPLE : The Necker cube • individual elements just circles with white lines when put together it’s something more than just 8 of these individual elements – we perceive a cube Gestalt psychologists described principles by which we organize sensations into perceptions. Individual Elements Gestalt Perception
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Gestalt Perceptual Organization Principles Chapter 5: Perception Gestalt psychologists Interested in how we organize individual parts of a stimulus into a complete whole Believed that the brain performs this organization in regular and predictable ways Described principles by which we organize sensations into perceptions Figure-ground relationship - the process of determining the object from its background Perceptual grouping principles - strategies used by the visual system to group sensory “building blocks” into complete perceptions
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Grouping Principles: Proximity Chapter 5: Perception Proximity Things that are near each other tend to be grouped together
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Grouping Principles: Closure Chapter 5: Perception Closure Brain tends to fill in gaps in order to perceive complete forms
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Grouping Principles: Similarity Chapter 5: Perception Similarity Things that are alike in some way (e.g. color, shape, size) tend to be perceived as belonging together
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Grouping Principles: Continuity Chapter 5: Perception Continuity Lines and patterns tend to be perceived as continuing in space
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Grouping Principles: Simplicity Chapter 5: Perception
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Chapter 5 Part 2 - Perception (part 2) Today's topics Form...

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