Abstract

The distinction between open and closed class items represents a fundamental bifurcation in the mental lexicon. It proved useful to express certain basic generalisations in linguistics and in the study of language acquisition and language pathology. The distinction is too rough tough: it must be refined by paying attention to the computational properties of the two classes and their division of labor in the generation of complex expressions. It will be shown how the distinction is expressed within current linguistic models of the principles and parameters / minimalist type.