Cross-sectional and longitudinal patterns of dedifferentiation in late-life cognitive and sensory function: The effects of age, ability, attrition, and occasion of measurement
Cross-sectional and longitudinal patterns of dedifferentiation in late-life cognitive and sensory function: The effects of age, ability, attrition, and occasion of measurement
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DOI：
10.1037/0096-3445.132.3.470
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发表时间：
2003-09-01
影响因子：
4.1
通讯作者：
Luszcz, MA
中科院分区：
文献类型：
--
作者：
Anstey, KJ;Hofer, SM;Luszcz, MA
去分化假说的年龄组差异，能力组差异，磨损组的差异，和时间方面进行了检查。认知和感觉数据进行了分析，从个人（n = 1，823）完成了临床评估，在澳大利亚老龄化纵向研究的3次测量中至少有一次。不一致的去分化效应与低能力和早期磨损的研究，但年龄相关的去分化没有发现。纵向分析证实了横断面分析。尽管实例之间的感觉和认知变量的去分化，一致的模式的去分化没有发现，这些结果并不支持的观点，即共享的生物因素变得越来越重要，用于解释在以后的生活中的认知和感觉功能的个体内变化。
The dedifferentiation hypothesis is examined with respect to age-group differences, ability-group differences, attrition-group differences, and time. Cognitive and sensory data were analyzed from individuals (n = 1,823) who completed a clinical assessment on at least I of 3 occasions of measurement in the Australian Longitudinal Study of Ageing. Inconsistent dedifferentiation effects were associated with low ability and early attrition from the study, but age-related dedifferentiation was not found. Longitudinal analyses confirmed the cross-sectional analyses. Even though instances of dedifferentiation were identified between pairs of sensory and cognitive variables, consistent patterns of dedifferentiation were not found. These results do not support the view that shared biological factors become increasingly important for explaining within-individual change in cognitive and sensory function in later life.