Abstract:
INTRODUCTION:Anomia is an impairment of naming: the retrieval of specific lexical items from the mental lexicon. Theoretically, whether anomia reflects a failure of selection at the preverbal "idea" level or at the subsequent linguistic formulation stage remains a topic of debate. We investigated the preverbal mechanism of idea selection for sentence generation, which requires the selection of a proposition from among competing alternatives during message formulation, in patients with severe anomia. METHOD:Patients with lesions to the left temporal lobe (N = 12), presenting with clinically defined anomia, and matched healthy controls (N = 24) completed sentence-level tasks that required the oral generation of a sentence or single word when presented with a word, a word pair, or a sentence. Selection demands were manipulated so that the stimuli activated many competing response options (low constraint) or one dominant or few response options (high constraint). RESULTS:There was no effect of stimuli constraint in the patient group that differed from that in the healthy control group on any of the generation tasks, suggesting that idea-level selection is intact in the patient group. CONCLUSIONS:These findings have implications for theoretical models of spoken language production and for clinical treatments of anomia.
journal_name
J Clin Exp Neuropsycholjournal_title
Journal of clinical and experimental neuropsychologyauthors
Barker MS,Robinson GAdoi
10.1080/13803395.2018.1562050subject
Has Abstractpub_date
2019-05-01 00:00:00pages
353-363issue
4eissn
1380-3395issn
1744-411Xjournal_volume
41pub_type
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