A behavioral study of the nature of verb production deficits in Alzheimer's disease
| Autor: | Aline Nunes da Cruz, Bárbara Costa Beber, Marcia Lorena Fagundes Chaves |
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| Rok vydání: | 2014 |
| Předmět: |
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Linguistics and Language Cognitive Neuroscience Experimental and Cognitive Psychology Verb Disease Semantics Language and Linguistics Speech and Hearing Fluency Executive Function Alzheimer Disease Noun medicine Humans Speech Aged Verbal Behavior medicine.disease Word lists by frequency Case-Control Studies Production (computer science) Female Alzheimer's disease Psychology Cognition Disorders Photic Stimulation Cognitive psychology |
| Zdroj: | Brain and language. 149 |
| ISSN: | 1090-2155 |
| Popis: | Patients with Alzheimer's disease (AD) may experience greater difficulty with verb production than with noun production. In this study, we sought to assess the nature of verb production deficits in AD by using verb fluency and verb naming tasks. We designed two hypotheses for this verb deficit: (1) executive impairment drives the deficit; (2) semantic impairment drives the deficit. Thirty-five patients with AD and 35 matched healthy controls participated in the study. Both groups performed a verb naming task composed of 45 pictures (low-, medium-, and high-frequency subsets) and a verb fluency task (scored for total correct words and for mean word frequency). Patients with AD were equally impaired in verb naming and verb fluency, with an effect of disease severity on verb naming. Word frequency influenced verb naming, but not verb fluency, performance. Our results indicate that verb production deficits in AD seem to be driven more by semantic than by executive impairment. |
| Databáze: | OpenAIRE |
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