Purpose: Grammatical encoding (GE) is impaired in agrammatic aphasia; however, the nature of such deficits remains unclear. We examined grammatical planning units during real-time sentence production in speakers with agrammatic aphasia and control speakers, testing two competing models of GE. We queried whether speakers with agrammatic aphasia…

There are several accounts of why some individuals with post-stroke aphasia experience difficulty in producing morphologically complex verbs. Although a majority of these individuals also produce syntactically flawed utterances, at least two accounts focus on word-level encoding operations. One account proposes a difficulty with rule-governed…

Hierarchical models of agrammatism propose that sentence production deficits can be accounted for in terms of clausal syntactic structure [Friedmann, N., & Grodzinsky, Y. (1997). "Tense and agreement in agrammatic production: Pruning the syntactic tree." "Brain and Language, 56", 397-425; Hagiwara, H. (1995). "The breakdown of functional…

This study examined the nature of verb deficits in 14 individuals with probable Alzheimer's Disease (PrAD) and nine with agrammatic aphasia. Production was tested, controlling both semantic and syntactic features of verbs, using noun and verb naming, sentence completion, and narrative tasks. Noun and verb comprehension and a grammaticality…

This study, with five adults diagnosed with Broca's aphasia with agrammatism, evaluated the acquisition and generalization of complex-sentence production using Linguistic Specific Treatment (LST) and the utility of syntactic theory in evaluating treatment effects. The study's findings support the use of LST, which applies syntactic theory to…

Four individuals with agrammatic aphasia were trained to comprehend and produce filler-gap sentences with wh-movement. Two participants received treatment first on the least complex structure (who-questions), and 2 received treatment on the most complex form (object-relative constructions). Object-relative training resulted in robust…