Frequency and intensity discrimination measured in a maximum-likelihood procedure from young and aged normal-hearing subjects
Frequency and intensity discrimination measured in a maximum-likelihood procedure from young and aged normal-hearing subjects
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DOI：
10.1121/1.421127
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发表时间：
1998-01-01
影响因子：
2.4
通讯作者：
Mills, JH
中科院分区：
文献类型：
--
作者：
He, NJ;Dubno, JR;Mills, JH
采用最大似然法对听力正常的老年受试者和听力正常受试者进行频率和强度分辨的测量。这种方法比其他心理物理方法更受欢迎，因为它是有效的，并控制了实验方差，这是测试老年受试者非常理想的特征。为了实施该方法，还使用恒定刺激程序测量了年轻受试者在每项任务中的心理测量功能。对于年轻受试者，从这两个过程中获得的不同阈值大体上是相似的。此外，这两组数据都与以前的文献一致，表明最大似然法成功地应用于频率和强度区分。青年和老年受试者在频率和强度辨别上均存在频率依赖性差异。即使有非常匹配的听力图，老年受试者表现出比年轻受试者更差的辨别能力。与年龄相关的差异总是在500赫兹处最大，并随着频率的增加而减小。(C)1998年美国声学学会。
A maximum-likelihood method was applied in measurements of frequency and intensity discrimination for aged and young normal-hearing subjects with closely matched audiograms. This method was preferred over other psychophysical procedures because it is efficient and controls experimental variance, features that are highly desirable for testing aged subjects. In order to implement the method, psychometric functions for each task were also measured from young subjects using a constant-stimuli procedure. For the young subjects, the differential thresholds obtained from these two procedures were generally comparable. Further, both sets of data were consistent with previous literature, indicating that the maximum-likelihood method was successfully applied for frequency and intensity discrimination. A frequency-dependent difference between young and aged subjects in both frequency and intensity discrimination was observed. Even with closely matched audiograms, aged subjects demonstrated poorer discrimination abilities than young subjects. The age-related difference was always largest at 500 Hz and decreased as frequency increased. (C) 1998 Acoustical Society of America.