Correct me if I am wrong, but I don't think she gave her definition. She described the general types of rationality (normative, descriptive and prescriptive). These aren't new and are described by Baron in Thinking and Deciding, for example.

In short, normative models tell us how to evaluate judgments and decisions in terms of their departure from an ideal standard. Descriptive models specify what people in a particular culture actually do and how they deviate from the normative models. Prescriptive models are designs or inventions, whose purpose is to bring the results of actual thinking into closer conformity to the normative model. If prescriptive recommendations derived in this way are successful, the study of thinking can help people to become better thinkers.