在认知不受损的老年人中,认知个体内变化指数的可靠性和稳定性
Sidonia E Compton1,2, Troy A Webber3,4,5, Steven Paul Woods4
1Department of Psychology, University of North Texas, Denton, TX, USA.
The Clinical neuropsychologist
|September 13, 2025
概括
在老年人中,认知个体内变异性 (IIV) 随着时间的推移是稳定的,但其测试-重新测试可靠性很差. 这表明IIV可以提供补充的临床预后信息,尽管有测量限制.
科学领域:
- 神经科学是一个神经科学.
- 心理学 心理学 心理学
- 老年学是一门学科.
背景情况:
- 认知个体内变异性 (IIV) 衡量人体内的表现波动.
- IIV预测认知能力下降,但其稳定性和可靠性在没有受损的老年人需要调查.
- 了解IIV的心理测量特性对于其临床应用至关重要.
研究的目的:
- 评估认知分散指数的平均水平稳定性和测试-重新测试可靠性.
- 为了确定可靠的IIV措施的变化值在认知不受损的老年人.
- 评估IIV在应用神经心理学环境中的实用性.
主要方法:
- 分析了来自NACC统一数据集3.0.0的2224名认知不受损的老年人的数据.
- 计算的个体内标准偏差 (ISD) 和变化系数 (CoV) 分散指数.
- 在平均425天内评估稳定性,可靠性和可靠变化指数 (RCI).
主要成果:
- 认知分散指数 (ISD,Cov) 显示了非常小的平均水平变化,表明稳定性.
- 与全球分数 (r = .82) 相比,IIV指数的测试-重新测试可靠性很差 (r = .41).
- 在IIV的显著变化被定义为大于1.75标准偏差.
结论:
- 在大约14个月的时间内,在没有受损的老年人中,认知分散是稳定的.
- IIV指数的测试重复测试可靠性差可能源于随机测量错误.
- 虽然IIV对临床预后有希望,但由于可靠性限制,其解释需要谨慎.
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