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Pattern Recognition Presentation

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Pattern Recognition 1 Chapter 2 Pattern Recognition ◼ Stage of perception during which a stimulus (e.g., visual or auditory) is identified Pattern Recognition ◼ Humans recognize patterns quickly and easily  Makes ◼ it challenging to study How do you study it?  Need to make the task difficult Pattern Recognition ◼ Present stimuli for only a few milliseconds (msec) and then start to observe mistakes ◼ Study the mistakes (where are the mistakes happening, etc.) Theories of Pattern Recognition ◼ Pattern recognition requires information from long-term memory (LTM), but we need more specific theories about this relationship:  Template theories  Feature theories  Structure theories Template Theories of Pattern Recognition ◼ Template Theories  First level, an unanalyzed pattern that is matched against alternative patterns by using the degrees of overlap as a measure of similarity Template Theories of Pattern Recognition 8 x 8 matrix pattern (1 sec) ISI (20, 60, 100, 300, or 600 msec) pattern in same position or horizontal or vertical row report same or different Template Theories of Pattern Recognition Template Theories of Pattern Recognition ◼ Limitations of template theories:  Template must be same size and in same position and orientation  Doesn’t account for large amount of variability of patterns  Provides no information about how 2 patterns are different  Doesn’t allow for alternative description ...
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