Semantic network function captured by word frequency in nondemented APOE ε4 carriers.
Semantic network function captured by word frequency in nondemented APOE ε4 carriers.
复制标题
非痴呆 APOE ε4 载体中词频捕获的语义网络功能。
DOI：
10.1037/neu0000508
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发表时间：
2019
期刊：
影响因子：
2.4
通讯作者：
Manly,JenniferJ
中科院分区：
文献类型：
--
作者：
Vonk,JetMJ;Flores,RoxannaJ;Rosado,Dayanara;Qian,Carolyn;Cabo,Raquel;Habegger,Josina;Louie,Karmen;Allocco,Elizabeth;Brickman,AdamM;Manly,JenniferJ
ObjectiveAccurate identification of the earliest cognitive changes associated with Alzheimer’s disease (AD) is critically needed. Item-level information within tests of category fluency, such as lexical frequency, harbors valuable information about the integrity of semantic networks affected early in AD. To determine the potential of lexical frequency as a cognitive marker of AD risk, we investigated whether lexical frequency of animal fluency output differentiated APOE ε4 carriers from noncarriers in a cross-sectional design among older African-American adults without dementia.MethodWe analyzed animal fluency performance using mean number of items and mean lexical frequency among 230 cognitively normal African Americans with and without the APOE ε4 allele.ResultsLexical frequency was higher in APOE ε4 carriers than noncarriers when analyzed as a mean score and within time bins. In contrast, we found no group difference in the number of items produced. Lexical frequency was particularly sensitive to ε4 status after the first 10 s of the 60-s animal fluency task.ConclusionOur results suggest that psycholinguistic features may hold value as a cognitive biomarker for identifying people at high risk of AD.
