 The Cognitive Structure of Scientific Revolutions by Hanne Andersen, Peter Barker, and Xiang Chen (2006) also devotes a good deal of attention to cognition and categorization issues, in a defense of the later Kuhn’s approach. The work of cognitive psychologist Lawrence Barsalou and of philosopher-historian Nancy Nersessian (the founder of the “cognitive historical” approach to science) plays a significant role in their account. Nersessian herself (2003, 2008) emphasizes model-based reasoning. These are no longer static cases or exemplars, for they possess an internal dynamic.