ABSTRACT
IT IS THE INTENTION in this chapter to outline some of the methods that have been used to model cognition. However, rather than simply give a disconnected list of techniques and recipes, we choose to emphasise some fundamental principles and high-level issues. Of course, we have to make any abstract ideas concrete with examples but the reader should not come away with the impression that, just because a model has not been given here for a particular cognitive process, no such model exists.
