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Walker, Grant M.; Schwartz, Myrna F.; Kimberg, Daniel Y.; Faseyitan, Olufunsho; Brecher, Adelyn; Dell, Gary S.; Coslett, H. Branch – Brain and Language, 2011
Semantic errors in aphasia (e.g., naming a horse as "dog") frequently arise from faulty mapping of concepts onto lexical items. A recent study by our group used voxel-based lesion-symptom mapping (VLSM) methods with 64 patients with chronic aphasia to identify voxels that carry an association with semantic errors. The strongest associations were…
Descriptors: Evidence, Semantics, Aphasia, Patients
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Schnur, Tatiana T.; Schwartz, Myrna F.; Brecher, Adelyn; Hodgson, Catherine – Journal of Memory and Language, 2006
Nonaphasic speakers are known to take longer to name pictures when they are blocked by semantic category and repeated multiple times. We replicated this ''semantic blocking effect'' in older controls and showed that in aphasia, the effect is manifested in increased error rates when naming semantically homogeneous, compared to mixed blocks. We…
Descriptors: Semantics, Aphasia, Error Analysis (Language), Perceptual Impairments