L2.2 - Memory Systems (Jul-25)

L2.2 - Memory Systems (Jul-25) - Overview ! Purpose of...

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Psychology C120: Lecture 2.2 — Memory Systems Psychology C120: Lecture 2.2 Memory Systems Kinds of Memory The Biological Approach The Modeling Approach Endcap 19 Psychology C120: Lecture 2.2 — Memory Systems Overview ! Purpose of computational cognitive modeling (Sun, 2008) ! Understanding behavior requires assumptions about how mind works ! All research makes assumptions, but computational models encode them in detail ! Allows full exploration of consequences, exposes gaps in theorizing ! Goals: express theory, generate predictions 20 Psychology C120: Lecture 2.2 — Memory Systems Spreading Activation ! Meyer and Schvaneveldt, 1971, Exp. 1 ! Presented pairs of words ! Had to decide whether both were words ! Faster RT with related vs. unrelated (855 ms vs. 950 ms) ! Currently attended-to items make associated memories more available 21 Related Unrelated Non-Word BREAD NURSE MARB BUTTER BUTTER BUTTER Psychology C120: Lecture 2.2 — Memory Systems Semantic Memory ! Semantic memory permits property inferences ! Mammals nurse their young ! Koalas are mammals ! Koalas nurse their young ! Goal: account for how knowledge stored and inferred, use spreading activation 22
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Psychology C120: Lecture 2.2 — Memory Systems Hierarchical Networks ! Problem: How to do property verifcation ! Collins and Quillian, 1969, 1972 ! Storing info for all instances inefFcient ! Better to
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This note was uploaded on 11/19/2011 for the course PSYCH 120 taught by Professor Hald during the Summer '09 term at University of California, Berkeley.

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L2.2 - Memory Systems (Jul-25) - Overview ! Purpose of...

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