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Week 5, Lecture 2 (09/08) -

by: Leslea Motley

Week 5, Lecture 2 (09/08) - 4100

Marketplace > University of Georgia > Psychology (PSYC) > 4100 > Week 5 Lecture 2 09 08
Leslea Motley
GPA 3.56

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About this Document

Focus on top-down and bottom-up processing
Cognitive Psychology
Kara Dyckman
Class Notes
processing, cognition
25 ?




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This 3 page Class Notes was uploaded by Leslea Motley on Thursday September 8, 2016. The Class Notes belongs to 4100 at University of Georgia taught by Kara Dyckman in Fall 2016. Since its upload, it has received 3 views. For similar materials see Cognitive Psychology in Psychology (PSYC) at University of Georgia.

Popular in Psychology (PSYC)


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Date Created: 09/08/16
I. VIDEO – perception “Which Leg belongs to who….” Youtube II. The Complexity of Perception  Perception is unique to individuals and usually includes both:  Bottom-up Processing o Perception based on pattern of neural firing to stimulus characteristics o Means that we get info from the stimulus we are encountering and it causes our neurons to fire in some way  Top-down Processing o Experience and expectation lead our perceptions; these are things that we already have in our brains o Heuristics: Gestalt (the whole is different from the sum of its parts) o Means that we start from where the stimulus is registered and move forward toward more complex interpretation III. Bottom-Up Processing:  Physiological o Feature Detectors - specialized neurons that respond only to certain sensory information o Hubel & Wiesel (1965) concluded that specific neurons in visual cortex respond to specific stimulus (i.e., vertical or horizontal lines)  Neurons and the Environment o Experience-dependent plasticity: neurons become tuned to react to specific line orientations, tuned to become feature detectors o Blakemore & Cooper(1970) - selective rearing experiments IV. Template Matching  People used to think that we knew what something as because it matched a stimulus we had previously stored  This is a very inflexible theory that does not really work.  Something that does use ‘template matching’ – checks – routing and account #’s – written in a particular font and are always in the same place on a check because the ‘check reading machine’  CAPTCHA V. Feature Analysis  Simpler than full analysis  Weight features  Fewer templates VI. Recognition by Components  More complex objects  Recognition-by-components theory (RBC)  Biederman  Came up with 36 geometric shapes and concluded that with the combination of any of these ‘geons’ will make any shape VII. Top-Down Processing (‘Constructive Perspective’)  Make inferences quickly/automatically based on context  context used to supplement info VIII. Occlusion Heuristic  We have learned that if something is in front of something else, you cannot see it, but you know it continues to exist IX.


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