ABSTRACT
There is now a large and exciting body of work on the differences between the beginners and the expert practitioners in some domain of science. The shift from naive to expert is a shift from one system of beliefs about the physical world to another, one set of concepts to another, one set of problem solving capabilities to another. As such, this shift resembles theory change in the history of science. As of yet, the two fields of study have made very little contact, although several chapters in this volume begin to bring the two endeavors together.
