Addressed whether hierarchical relations and word order can be separated in sentence production. Assessed in two experiments whether subject-verb agreement errors require linear proximity of a so-called "local" noun to the verb. Found evidence for a stage in language production in which a syntactic structure is built prior to stage in which words…

Investigated the source of agrammatic aphasic patients' difficulty comprehending semantically reversible sentences. Found approximately equal distributions of three distinct patterns. Results conflict with explanations of comprehension failure which state that a single pattern of performance on sentence structures characterizes comprehension of…

Reports four experiments examining subject-verb agreement errors in Spanish and English. Discusses cross-linguistic differences within the framework of the computational model of grammatical encoding proposed by Kempen and Hoenkamp. Suggests that languages differ in the extent to which the selection of the verb is controlled by features on the…