Lecture16-Concepts - Lecture 16: Concepts Fall 2009 Prof....

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1 Lecture 16: Concepts Fall 2009 Prof. Lombrozo Overview of today’s class: 1. Two theories of concepts - Classical view - Prototype theories 2. The basic level Reminder: Assignment 6 due by Wed @ 10pm 16.2 Celestial Empire of Benevolent Knowledge Animals are divided into: (a) belonging to the emperor, (b) embalmed, (c) tame, (d) sucking pigs, (e) sirens, (f) fabulous, (g) stray dogs, (h) included in the present classification, (i) frenzied, - Jorge Luis Borges (j) innumerable, (k) drawn with a very fine camelhair brush, (l) et cetera, (m) having just broken the water pitcher, (n) that from a long way off look like flies. 16.3
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2 16.4 Why categorize? • (1) Cognitive Economy – E.g. memory limitations – E.g. language & communication Images courtesy of Lauren Schmidt 16.5 Why categorize? • (2) Basis for generalization – E.g. infer unknown properties Category members Novel item What does the occluded portion look like? 16.6 Some Definitions Category : a group of objects or properties. Categorization : the process of identifying the category an object belongs to (typically for some purpose). Concept : a mental representation that picks out a group of objects or properties. ± Concept Category Concepts = “units of thought”
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3 16.7 Theories of Concepts: Overview • The Classical View • Probabilistic Theories – Prototype Theories – Exemplar Theories • The “theory-theory” 16.8 The Classical View Intuition : concepts have definitions More precisely : concepts can be defined in terms of individually necessary and jointly sufficient conditions Aristotle
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This note was uploaded on 10/01/2011 for the course COG SCI 10 taught by Professor Lombrozo during the Fall '09 term at University of California, Berkeley.

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Lecture16-Concepts - Lecture 16: Concepts Fall 2009 Prof....

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