Knowledge

1. Definition Approach

1.1. Determining whether a particular object meets the definition of the category

1.2. Work well for geometric objects

1.3. Most natural objects and many humanmade objects NOT work well

2. Exemplar Approach

2.1. Determining whether an object is similar to a standard object

2.2. Exemplars = actual members of the category that a person has encountered in the past

3. Prototype Approach

3.1. Comparing the object to a prototype that represents the category

3.2. Prototype = “typical” member of the category