AGE-RELATED DIFFERENCES IN 2 STAGES OF CENTRAL PERCEPTUAL PROCESSES - EFFECTS OF SHORT DURATION TARGETS AND CRITERION DIFFERENCES
AGE-RELATED DIFFERENCES IN 2 STAGES OF CENTRAL PERCEPTUAL PROCESSES - EFFECTS OF SHORT DURATION TARGETS AND CRITERION DIFFERENCES
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DOI：
10.1093/geronj/34.2.234
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发表时间：
1979-01-01
期刊：
影响因子：
--
通讯作者：
HERTZOG, CK
中科院分区：
文献类型：
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作者：
WALSH, DA;WILLIAMS, MV;HERTZOG, CK
采用分视后向掩蔽范式考察了中枢知觉加工速度的年龄差异。12名年轻人（平均年龄= 19.6岁）和12名老年人（平均年龄= 68.5岁）作为受试者。实验1研究了年龄差异的速度，中央知觉过程中使用的一个上升的限制程序和强迫选择控制标准的差异。使用2-30 ms的目标持续时间进一步测试年轻人和老年人掩蔽函数与被认为描述中枢性掩蔽的加性规则的拟合。实验1的结果显示，老年人样本的处理速度慢了33%。两个年龄组的掩蔽函数在所使用的广泛目标持续时间范围内符合中心规则。实验2研究了知觉检测的2和20 ms的目标在7刺激发作之间的目标和掩蔽刺激使用强迫选择程序的时间间隔。亚组分析的2个不同的组件所观察到的功能表明，老年人的样本是同样缓慢的完成早期和晚期状态的中央知觉处理。
Age differences in speed of central perceptual processes using a dichoptic backward masking paradigm were investigated. Twelve young (mean age = 19.6 yr) and 12 old (mean age = 68.5 yr) adults served as subjects. Experiment 1 examined age differences in speed of central perceptual processes using an ascending limits procedure and forced-choice responding to control for criterion differences. Target durations from 2-30 ms were used to further test the fit of young and elderly masking functions to the additive rule believed to describe masking arising centrally. Results from experiment 1 showed a 33% slower speed of processing in the elderly sample. Masking functions for both age groups fit the central rule across the wide range of target durations used. Experiment 2 examined the perceptual detectability of a 2 and 20 ms target at 7 stimulus onset asynchronies between target and masking stimuli using a forced-choice procedure. Subanalysis of 2 different components of the observed functions suggested the elderly sample was equally slow in completing both an early and late state of central perceptual processing.