Typicality of Words Produced on a Semantic Fluency Task in Amnesic Mild Cognitive Impairment: Linguistic Analysis and Risk of Conversion to Dementia

作者: Maria Gabriella Vita , Camillo Marra , Pietro Spinelli , Alessia Caprara , Eugenia Scaricamazza

DOI: 10.3233/JAD-140570

关键词: Verbal fluency testWord countSemantic memoryCognitive psychologyWord lists by frequencyFluencyPsychologyTask (project management)Age of AcquisitionDementia

摘要: Semantic and, to a lesser extent, phonological verbal fluency tasks are impaired in Alzheimer's disease (AD) and amnesic mild cognitive impairment (aMCI). Furthermore, both have been considered as possible markers of conversion from aMCI AD. Up recent years, the use has limited word count, but, more recently, linguistic variables, such frequency, age acquisition, familiarity, typicality, also considered. In particular, attention focused on typicality words produced semantic tasks, because tendency produce only typical members various categories points an impoverishment memory. The aim our study was compare aMCI, AD, control subjects lexical (word frequency) lexical-semantic variable (item typicality) task, evaluate value these variables predicting AD during 2 years follow-up period. We found no difference mean by whereas groups higher than subjects. assess relationship between values risk group split two subgroups, including who obtained lower or median whole group. Consistent with hypothesis, significantly frequent high low

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