Levels of representation and units of access relevant to agrammatism.

The paper differentiates argument structure from other levels of representation and uses linguistic analysis of aphasic narrative production to support an enriched lexical entry for verbs that includes the d-structure representation of the configuration of the verb, its arguments, and any other lexically selected material. A single narrative production study and portions of two follow-up studies are presented. The argument structure distributions for two agrammatics (with varying degrees of fluency) and a nonagrammatic conduction aphasic with anomia are compared and contrasted with both matched controls and each other.