Processing lexicality in healthy aging and Alzheimer’s disease

IF 0.6 Q3 LINGUISTICS

Mental Lexicon Pub Date : 2021-12-31 DOI:10.1075/ml.20028.aze

N. Azevedo, R. Atchley, N. Vasavan Nair, E. Kehayia

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引用次数: 0

Abstract

To explore how processing lexicality may change with aging and in the presence of Alzheimer’s disease (AD), we conducted two experiments investigating lexicality judgements using an on-line behavioural psycholinguistic methodology and electrophysiological/event-related potential (ERP) methods; oddball lexical decision tasks. Results from these lexical decision tasks showed that while those with AD show similar rates of accuracy for their lexical decision as compared older adults (OA), they are particularly slowed when making judgements for pseudowords. Our results from the ERP tasks also showed that the two groups behaved differently with regard to elicitation of the P3 ERP response, which indicates differences in how these two groups form lexical categories. The pattern of ERP responses suggests that older adults are sensitive to the orthography/phonology of the stimuli during the course of lexical processing as compared to participants with AD who show less sensitivity to orthographic/phonological cues. Additionally, the ERP P3 amplitude results suggest further linguistically related differences between healthy older adults and those with AD, and highlight the importance and usefulness of combining behavioural psycholinguistic and ERP methodologies.

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健康衰老和阿尔茨海默病的词性加工

为了探索在阿尔茨海默病（AD）存在的情况下，词汇处理如何随着年龄的增长而变化，我们使用在线行为心理语言学方法和电生理/事件相关电位（ERP）方法进行了两项实验，研究词汇判断；奇怪的词汇决策任务。这些词汇决策任务的结果表明，尽管AD患者的词汇决策准确率与老年人（OA）相似，但他们在判断假名时尤其慢。我们的ERP任务结果还表明，两组在P3 ERP反应的激发方面表现不同，这表明这两组在形成词汇类别方面存在差异。ERP反应模式表明，与AD参与者相比，老年人在词汇处理过程中对刺激的正字法/音韵学敏感，AD参与者对正字法或音韵学线索的敏感性较低。此外，ERP P3振幅结果表明，健康老年人和AD患者之间存在进一步的语言相关差异，并强调了将行为心理语言学和ERP方法相结合的重要性和有用性。

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来源期刊

Mental Lexicon LINGUISTICS-

CiteScore

1.50

自引率

0.00%

发文量

期刊介绍： The Mental Lexicon is an interdisciplinary journal that provides an international forum for research that bears on the issues of the representation and processing of words in the mind and brain. We encourage both the submission of original research and reviews of significant new developments in the understanding of the mental lexicon. The journal publishes work that includes, but is not limited to the following: Models of the representation of words in the mind Computational models of lexical access and production Experimental investigations of lexical processing Neurolinguistic studies of lexical impairment. Functional neuroimaging and lexical representation in the brain Lexical development across the lifespan Lexical processing in second language acquisition The bilingual mental lexicon Lexical and morphological structure across languages Formal models of lexical structure Corpus research on the lexicon New experimental paradigms and statistical techniques for mental lexicon research.