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Chapter 2 Notes

by: Jaya Brown

Chapter 2 Notes Psyc 3330

Jaya Brown
GPA 3.61
Cognitive Psychology
Dr. Alley

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About this Document

These are notes that cover chapter 2.. chapter 3 coming soon
Cognitive Psychology
Dr. Alley
Class Notes
psychology cognitive
25 ?




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This 0 page Class Notes was uploaded by Jaya Brown on Thursday January 28, 2016. The Class Notes belongs to Psyc 3330 at Clemson University taught by Dr. Alley in Summer 2015. Since its upload, it has received 34 views. For similar materials see Cognitive Psychology in Psychlogy at Clemson University.


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Date Created: 01/28/16
Chapter 2 Two Theories of visual object recognition 1 Template Matching Models 0 Compare a stimulus w a set of speci c patterns templates in memory 0 Ex we can recognize an quot5 because there is an image in our brain that matches that letter 0 Problems 0 Size matching A A in theory they must be the same size 0 Orientation matching alignment tilting the projectionno match 0 Con guration matching Ex different variations in the letter A such as lowercase uppercase bubble letters etc o This is why they have letters in the box to tell if you are human because computers cannot identify the letter if they are distorted 0 Memory load huge number of templates required 0 Incomplete gures Ex the top left corner of an A being covered 2 Feature analysis detection theory 0 Register sensory input Detect features detect lines curves etc not just the overall product 0 Compare detected features to stored info memory 0 Decide on the best match 0 Ex Letter R 1 horizontal line two vertical lines 3 right angles 0 acute angles one discontinued curve 0 continued curves Then go through the entre alphabet to determine the letter R 0 Evidence for feature detection 0 Letters have distinctive features 0 Confusion errors eg C vs G vs H We confuse things that share features 0 Feature detectors in the visual cortex The brain is wired to detect feature of anything in the world around us 0 Problems 0 Top down processing is important This process is entirely bottom up but top down is just as important for perception Feature detection seems important by bottomup all by itself is insuf cient 0 Holistic gestalt effects Complexity effects when its easier to nd what you are looking for when it is more difficult Eg word superiority effect letters are identi es much quicker and accurately when apart of a word 0 Meaning our brains can work on more than one letter at a time Context effects some features and responses can vary 0 Special complex eg A 13 C amp 11 12 13 o Perceptual set a readiness to perceive things in a certain way usually due to expectations


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