2-18-lecture - Cognitive Psychology, Fourth Edition, Robert...

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Cognitive Psychology, Fourth Edition, Robert J. Sternberg Chapter 6 CogLab Encoding Specificity Revised due date:  Friday, March 7 th  by  5pm.   Information sheet posted on Ctools. 
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Cognitive Psychology, Fourth Edition, Robert J. Sternberg Chapter 6 Chapter 6 continued…  LTM and retrieval  
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Cognitive Psychology, Fourth Edition, Robert J. Sternberg Chapter 6 If You Do Not Retrieve from LTM… Has the memory disappeared?  or Is the memory still there but not retrievable? 
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Cognitive Psychology, Fourth Edition, Robert J. Sternberg Chapter 6 Evidence Supporting “Still There” Theory  Nelson (1971 ) Paired associate List 43-house 67-dog 38-dress 77-sissors Cued recall test 43- ________ 67- ________ Two week delay Subjects recalled 75% of items  on list But focus was on 25% they  forgot.
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Cognitive Psychology, Fourth Edition, Robert J. Sternberg Chapter 6 Nelson (1971) Critical Manipulation 25% “forgot” Relearned Results Same 38-dress 77-sissors 38-dress 77-sissors 78% Changed 38-dress 77-sissors 38-apple 77-kettle 43%
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Cognitive Psychology, Fourth Edition, Robert J. Sternberg Chapter 6 Processes of Forgetting and Memory  Distortion
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Cognitive Psychology, Fourth Edition, Robert J. Sternberg Chapter 6 What Contributes to Forgetting?  Decay theory Memory is weakened with disuse Interference theory  Proactive:  old memories interfere with recall of  new information Retroactive:  new memories interfere with recall  of old information
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Cognitive Psychology, Fourth Edition, Robert J. Sternberg Chapter 6 Interference versus Decay in STM Brown-Peterson Paradigm Participants were given 3 consonants to try to  remember (e.g., FRL) Participants were then given a 3 digit number  291, 288, 285)  After varying delays (3-18 seconds) participants  were asked to recall the 3 letters 
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Cognitive Psychology, Fourth Edition, Robert J. Sternberg Chapter 6 Brown-Peterson Results (1959) Results indicate  retroactive interference
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Cognitive Psychology, Fourth Edition, Robert J. Sternberg Chapter 6 Proactive Interference in STM 0 10 20 30 40 50 60 70 80 90 100 3 sec 6 sec 9 sec 12 sec 15 sec 18 sec Delay(seconds) Correct Recall % Trial 1 Trial 2 Trial 3 Keppel & Underwood (1962)
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Cognitive Psychology, Fourth Edition, Robert J. Sternberg Chapter 6 Retroactive Interference from LTM Experimental group Learn List A Learn List B Delay Test for Memory A Control group Learn List A ------------ Delay Test for Memory A The experimental group remembered less material from the tested list  A compared to the control group.  Why?  Because information learned afterwards interfered with retrieval of  List A.
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Cognitive Psychology, Fourth Edition, Robert J. Sternberg
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2-18-lecture - Cognitive Psychology, Fourth Edition, Robert...

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