11 Semantic Knowledge

11 Semantic Knowledge - Semantic Knowledge How are...

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Semantic Knowledge How are categories learned? What is the content of a category? Rules Prototype (best example) Exemplars (every episode experienced) What is the structure of category knowledge?
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Rule-Based Categories Categories are defined by rules Rules concern lists of features Having features define category membership Missing features excludes from category Discovering rules Hypothesis testing Develop idea Try idea with possible category members Feedback modifies hypothesis Bruner et al. (1956)
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1 2 3 4 5 6 A B C D E F G H I Trub 7 8 9
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Rule Based Categories Trub Simple Category Defined by the presence or absence of 1 feature Anything blue Think about the strategy to follow Varying one thing at a time Varying many things at a time
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1 2 3 4 5 6 A B C D E F G H I Flad 7 8 9
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Rule Based Categories Flad Conjunctive Category Combination of features Color (red) and Number (2 objects)
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1 2 3 4 5 6 A B C D E F G H I Drek 7 8 9
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Rule Based Categories Drek Disjunctive Presence of either feature gets you in the category Object Color (red) or object shape (square) Complex categories Complex combination of features
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Are categories rule based? Clearly people can use features and rules for defining categories Does that describe most categories? Does that describe how people generally think? What are natural categories like?
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Think about the defining features for various categories All members have Non-members do not have Can be a combination Games? Dogs?
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This note was uploaded on 06/10/2008 for the course PSYCH 210 taught by Professor Hyman during the Spring '08 term at Western Washington.

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11 Semantic Knowledge - Semantic Knowledge How are...

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