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单语者在语言方面优于双语者,但在衰老和认知障碍方面没有执行功能
Stefanie Gard1, Joseph Saad1, Christine L Sheppard2
1School of Psychology, University of Ottawa.
Neuropsychology
|July 3, 2025
概括
双语不会对老年人的认知表现产生普遍的保护作用,单语者比双语者晚被诊断出轻度认知障碍 (MCI).
科学领域:
- 认知神经科学 认知神经科学
- 衰老研究研究 衰老研究
- 心理语言学 心理语言学
背景情况:
- 主观认知衰退 (SCD) 是轻度认知障碍 (MCI) 和痴呆症的前体.
- 在以前的研究中,双语与认知优势有关.
- 双语对不同认知状态 (健康,SCD,MCI) 的认知表现的影响需要进一步研究.
研究的目的:
- 检查SCD和没有SCD的老年人的认知表现.
- 研究双语与健康老年人,SCD患者和MCI患者的认知表现之间的关联.
- 确定双语对MCI诊断年龄的影响.
主要方法:
- 264名65岁以上的成年人完成了语言和神经心理测试.
- 参与者被分为单语或双语,并按认知状态 (健康,SCD或MCI) 分类.
- 在语言,记忆和执行功能领域评估认知表现.
主要成果:
- 在健康的老年人和SCD患者之间没有发现认知差异.
- 患有MCI的个体在大多数认知任务中表现明显较低.
- 单语者在几个特定的语言和流利性任务上表现优于双语者,但不是执行功能.
结论:
- 双语的认知益处可能不适用于所有个人和所有认知状态.
- 与双语人士相比,这个样本中的单语人士在晚年被诊断出患有MCI.
- 需要进一步的研究来了解双语,认知衰老和神经退行性疾病之间的复杂相互作用.
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