Categorization is based on lists of defining features.
Probabilistic Theories of Categorization A. Categories are defined in terms of typical or characteristic features. Categorization is based on the average, or best example, of members of the category. Prototype has characteristic values on all the features . D. Rosch s Theory of Categorization 1. The most economical way of doing this is to choose the most general and inclusive level of abstraction at which categories can be easily differentiated.