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  • Title: Category and letter fluency in semantic dementia, primary progressive aphasia, and Alzheimer's disease.
    Author: Marczinski CA, Kertesz A.
    Journal: Brain Lang; 2006 Jun; 97(3):258-65. PubMed ID: 16325251.
    Abstract:
    This study examined the impact of various degenerative dementias on access to semantic knowledge and the status of semantic representations. Patients with semantic dementia, primary progressive aphasia, and Alzheimer's disease were compared with elderly controls on tasks of category and letter fluency, with number of words generated, mean lexical frequency and errors recorded. The findings are consistent with the view that category and letter fluency rely on both common and unique cognitive processes. Fluency tasks, with the richness of data obtained, are valuable in distinguishing different dementia syndromes from one another.
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