Temporal processing deficits in the pre-senescent auditory system
Temporal processing deficits in the pre-senescent auditory system
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DOI：
10.1121/1.2172169
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发表时间：
2006-04-01
影响因子：
2.4
通讯作者：
Buss, E
中科院分区：
文献类型：
--
作者：
Grose, JH;Hall, JW;Buss, E
本研究验证了这一假设，即时间处理赤字是显而易见的，在前衰老（中年）听觉系统的听力任务，涉及简短的刺激，跨频率通道处理，和/或显着的处理负荷。间隙持续时间歧视（GDD）任务，使用固定持续时间的间隙标记（实验1）或随机持续时间标记（实验2）。自变量包括标准间隙持续时间（0，35，和250毫秒），标记频率（内和跨频率），和任务的复杂性。共有18名听力正常的青年和23名中年听众参加了GDD实验。中年在操作上被定义为40-55岁。结果表明，中年听众的表现比一般的年轻听众更差，这种赤字有时，但并不总是，加剧了任务复杂性的增加。第三个实验采用了分类感知任务，测量与感知边界相关的差距持续时间。对12名听力正常的青年和12名中年人的实验结果表明，青年人的范畴边界与较短的间隔有关。这些实验的结果表明，时间处理缺陷可以观察到相对较早的老化过程中，并在中年明显。(c)2006年，美国声学学会。
This study tested the hypothesis that temporal processing deficits are evident in the pre-senescent (middle-aged) auditory system for listening tasks that involve brief stimuli, across-frequency-channel processing, and/or significant processing loads. A gap duration discrimination (GDD) task was employed that used either fixed-duration gap markers (experiment 1) or random-duration markers (experiment 2). Independent variables included standard gap duration (0, 35, and 250 ms), marker frequency (within- and across-frequency), and task complexity. A total of 18 young and 23 middle-aged listeners with normal hearing participated in the GDD experiments. Middle age was defined operationally as 40-55 years of age. The results indicated that middle-aged listeners performed more poorly than the young listeners in general, and that this deficit was sometimes, but not always, exacerbated by increases in task complexity. A third experiment employed a categorical perception task that measured the gap duration associated with a perceptual boundary. The results from 12 young and 12 middle-aged listeners with normal hearing indicated that the categorical boundary was associated with shorter gaps in the young listeners. The results of these experiments indicate that temporal processing deficits can be observed relatively early in the aging process, and are evident in middle age. (c) 2006 Acoustical Society of America.