ABSTRACT
Engineering design is a domain in which a number of complex problem solving activities occur. As in all such tasks, cognitive processes operate upon the internal representations of the task as well as upon other relevant knowledge. These representations can change over the course of experience in order to enable a person to better respond to the problems and challenges of a domain. The time course of these representation changes is a reflection of the structure and content of a domain as well as the cognitive learning mechanisms responsible for the changes.
