lecture10_June7th

lecture10_June7th - Does Ebbinghaus forgetting curve always...

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Does Ebbinghaus forgetting curve always apply? 1)The ‘Permastore’ concept Bahrick studies Impressive amounts of retention of memory for names and pictures of high-school classmates Method: 400 subjects (17-74 yrs old) Tested for retention of names/faces using free recall picture-cued recall picture recognition name recognition matching names to pictures
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Bahrick studies RESULTS: Good retention of autobiographical memories Even for memories over 30 years old! Why? prolonged learning/acquisition Distributed practice
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Graphing results
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Bahrick studies 2) Impressive amounts of retention of a learned foreign language Rapid initial forgetting, followed by SLOW forgetting METHOD: Tested memory for Spanish learned in high school Spanish rarely practiced Time since initial learning ranged over 50 years!
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Is memory always this good? Continuous motor skills show little forgetting Riding a bike Driving a car Discrete skills show much more forgetting Typing CPR
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Conclusions about forgetting? The “classic” Ebbinghaus forgetting curve is not as Universal as originally thought Forgetting curves vary depending on the type of material and its relevance to the person Rather than look for a “Universal Law”, researchers now focus on the “Conditions leading to forgetting” rather than forgetting itself
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Trace decay theory versus interference theory Trace decay theory –automatic fading of the memory trace Interference theory –disruption of the memory trace by other traces where the degree of interference depends upon the similarity of the two memory traces
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Conditions leading to forgetting Method 1 Compare memory after a delay that is filled with potentially interfering material and compare to unfilled delay Jenkins & Dallenback, 1928 Test memory following a filled delay (awake) vs. unfilled delay (sleep) Less forgetting following ‘unfilled delay’ So it isn’t mere passage of time that produces forgetting of information stored in LTM, but interpolated activity !
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Decay or interference?
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This note was uploaded on 03/19/2010 for the course PSYCH 207 taught by Professor Lodson during the Spring '05 term at Waterloo.

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lecture10_June7th - Does Ebbinghaus forgetting curve always...

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