This book presents a theory of learning from examples called Nested Generalized Exemplar (NGE) theory, and demonstrates its importance with empirical results in several domains. Nested Generalized Exemplar theory is a variation of a learning model called exemplar-based learning, which was originally proposed as a model of human learning by Medin and Schaffer [1978]. In the simplest form of exemplar-based learning, every example is stored in memory verbatim, with no change of representation. The set of examples that accumulate over time form category definitions; for example, the set of all chairs that a person has seen forms that person’s definition of “chair.” An example is normally defined as a vector of features, with values for each feature, plus a label which represents the category of the example.


Learning System Learning Program Concept Learning Disjunctive Normal Form Prediction Failure 
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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • Steven L. Salzberg
    • 1
  1. 1.The Johns Hopkins UniversityUSA

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