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Information Processing Models of Visual Pattern Recognition PPT

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Pattern Recognition 3 Chapter 2 Information-processing Models of Visual Pattern Recognition ◼ WHOLE-REPORT PROCEDURE If <5 letters, all correct As many letters as possible If >5, report 4.5 letters bottleneck Information-processing Models of Visual Pattern Recognition ◼ WHOLE-REPORT PROCEDURE  Why only 4.5 letters? ◼ inability to perceive (recognize) more letters? ◼ inability to remember more letters?  Sperling: can recognize most letters, but forget some Information-processing Models of Visual Pattern Recognition ◼ PARTIAL-REPORT PROCEDURE Average: with no delay, 3/4 letters; estimate 9/12 Information-processing Models of Visual Pattern Recognition ◼ PARTIAL-REPORT PROCEDURE Same as amount in whole-report! Information-processing Models of Visual Pattern Recognition ◼ Sperling’s Model of Pattern Recognition (1963) 1. Visual information store (VIS) ◼ ◼ Preserved photographic info for a brief period (250 msec) – “iconic memory” Rate of decay dependent upon:     intensity contrast duration of stimulus visual masking – following the stimulus with an unrelated stimulus Information-processing Models of Visual Pattern Recognition ◼ Sperling’s Model of Pattern Recognition (1963) 2. Scan component ◼ Visual store must be scanned (attentional component) 3. Rehearsal ◼ Repeating verbal info to keep it active in STM (auditory information) Information-processing Models of Visual Pattern Recognition ◼ ...
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