Lecture9-MemorySystems - Lecture 9: Memory Systems Fall...

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1 Lecture 9: Memory Systems Fall 2009 Prof. Lombrozo Overview of today’s class: 1. Forgetting (again): interference 2. Semantic & episodic memory 3. Procedural & declarative memory 4. Implicit & explicit memory Reminders: Assignment 2 due by Wed @ 10pm The organization of memory 9.2 Short-term memory Long-term memory Semantic Episodic Declarative Procedural Working Memory Model Central Executive Phonological loop Visuospatial sketchpad 9.3 Why do we forget? Theory 1 : memories “disappear” from long-term memory Theory 2 : memories remain in long-term memory, but we fail to retrieve them STM LTM M STM LTM M
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2 9.4 Nelson (1971) Training 43 - dog 56 - house 17 - tree 77 - potato Trained until no errors Test 43 - dog 56 - house 17 - ??? 77 - ??? 75% correct recall Retest 17 - tree 77 - ??? Old: 78% New: 43% Retraining 77 - melon 17 - tree “new” pair “old” pair Difference between old and new pairs at retest suggests original memories did not “disappear” 9.5 Interference • Retroactive interference • Proactive interference
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Lecture9-MemorySystems - Lecture 9: Memory Systems Fall...

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