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Exercise: Concept Learning Revisited

• Concepts have hierarchy

Classifying Birds

• many feature can be used for classification
• classification is important.

The Challenge of Classification

Cognitive systems

Assume both features (percept) and actions are binary, then the input output combination will be a large number. so that the mapping is complex, large, and hard to handle

Equivalence Classes

with Classification, we can index action based on concepts of percepts and reduce the number of combination of percept-action mapping.

Exercise: Equivalence Classes

Concept Hierarchies

• establish and refine

Exercise: Concept Hierarchies

• From classes to super classes: survey all the classes, extract common features into super class.

Types of Concepts

Axiomatic Concepts

Prototype Concepts

• property overside could change one concept to another (specification).

Exemplar Concepts

Order of Concepts

Exercise: Order of Concepts

Bottom-Up Search

assignment

recap

The Cognitive Connection

Classification allows us to select actions.