Lecture21

Lecture21 - Lecture 21 The verbal representation of...

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Lecture 21–The verbal representation of knowledge, part 2 March 14, 2008
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Review: semantic networks Similar concepts are close to one another in the network As an item is activated in memory, other associated items become activated (‘spreading activation’) Note that each node in the network does not represent a neuron, although they are connected in a similar way
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Basic methodology for semantic network research Category verification task: subjects are asked to verify or deny simple statements about the categorization of an item Examples: An apple is a fruit, a tomato is a fruit This task gives some insight into how knowledge is organized: apple is more tightly connected to the general concept of fruit than tomato is. Feature verification task: subjects are asked to verify a statement about the features of an item Examples: Cats like milk, Cats have skin This task helps to discover how features are stored and accessed
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Assumes that concepts are organized in a hierarchy, with specific concepts nested in more general ones
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This note was uploaded on 05/01/2008 for the course PSY 340 taught by Professor Macdonald during the Spring '08 term at NMSU.

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Lecture21 - Lecture 21 The verbal representation of...

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