02-12 Lecture Slides (Final)

G the 2d image on the retina is often ambiguous

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Unformatted text preview: already know from our prior experiences and contexts Both bottom-up and top-down processes are crucial 1 2/12/13 Bottom- Up Theories of Pattern Recognition Focusing on Feature Analysis (covered on 02/07) Pandemonium Model of Letter Recognition Recognition-by-Components (or Geon) Theory of Object Recognition Limitations of Purely Bottom- Up Processing (Covered on 02/07) n༆  The information directly available to the receptors (e.g., the 2D image on the retina) is often ambiguous Additional sources of information (= top- down processing) is necessary to efficiently resolve such ambiguities Some Examples of Top- Down Processing (covered on 02/07) n༆  Prior knowledge, expectations, and context can influence the way you perceive the stimulus (= top- down effects) 2 2/12/13 Some Lab- based Top- Down Effects n༆  Phoneme (or phonemic) restoration effect ¨༊  Listeners automatically fill in missing sounds (*), using context as a cue n༆  n༆  n༆  n༆  It was found that the *eel was on the shoe. It was found that the *eel was on the orange. It was found that the *eel was on the table. Word superiority effect ¨༊  Single letters are better identified in words than in nonwords or by themselves Main Points of Today’s Lecture n༆  The wor...
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