与衰老相关的词查找困难增加的认知组成部分
Hsi T Wei1,2, Dana Kulzhabayeva1,2, Lella Erceg2,3
1Department of Psychology, University of Toronto, Toronto, Canada.
概括
在老化过程中难以找到单词是很常见的. 处理速度,而不是特定的语言或抑制缺陷,最好预测词找问题和认知衰退,这表明口头反应时间是关键的临床指标.
科学领域:
- 认知神经科学 认知神经科学
- 心理语言学 心理语言学
- 老年学是指老年学的学科.
背景情况:
- 难以找到单词 (WFD) 是老年人的常见认知投诉.
- 了解WFD机制对于诊断神经退行性疾病至关重要.
- 理论包括处理速度,抑制性缺陷和传输缺陷假设.
研究的目的:
- 为了区分竞争理论之间的词寻找困难在老化.
- 研究词汇检索,执行功能和自发的WFD之间的关系.
- 评估词检索任务对认知衰退的诊断价值.
主要方法:
- 对125名健康成年人 (18-85岁) 进行了在线游戏化图片词干扰 (PWI) 任务.
- 收集执行功能任务数据和自然主义语音样本.
- 分析了与WFD和衰老相关的语义干扰和语音促进效应.
主要成果:
- PWI效应比抑制性缺陷假设 (IDH) 更多地支持传输缺陷假设 (TDH).
- 语义干扰随着年龄的增长而增加,语音促进随着年龄的增长而减少.
- 两种PWI效应都与自发的WFD无关;整体反应时间 (控制精神运动减速) 是最好的预测因素.
结论:
- 处理速度反映在口头反应时间中,似乎是与年龄相关的WFD的主要因素.
- 自发的WFD和执行功能的下降与处理速度有关.
- 语言反应时间可以作为认知衰老的有价值的临床指标.
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