Auditory memory and age-related differences in two-tone frequency discrimination: trace decay and interference.
Auditory memory and age-related differences in two-tone frequency discrimination: trace decay and interference.
复制标题
双音频率辨别中的听觉记忆和年龄相关差异：痕迹衰减和干扰。
DOI：
10.1080/03610738908259757
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发表时间：
1989
影响因子：
1.8
通讯作者：
Moberg,PJ
中科院分区：
文献类型：
--
作者：
Raz,N;Millman,D;Moberg,PJ
我们调查了年龄相关的差异，在时间过程中的双音频率歧视。在500 - 2000 Hz范围内听力正常的健康年轻人和老年人进行了两个选择的强迫选择频率辨别任务。刺激是由250-ms（短），850-ms（中）或3000-ms（长）的沉默间刺激间隔（ISI）分开的短音调。频率辨别阈值估计使用自适应阶梯程序。虽然年轻的听众表现优于老年人在所有的ISI，后者表现出显着的升高的歧视阈值在250毫秒，而阈值的年轻人显着增加在3000毫秒。这些结果表明，老年人可能特别容易受到掩蔽的影响所产生的第二个音在短时间间隔，而年轻的听众往往受到不同的影响，在长ISI的痕迹衰减。在刺激持续性假说的框架下对实验结果进行了讨论。
We investigated age-related diferences in the time course of two-tone frequency discrimination. Healthy young and elderly adults with normal hearing acuity in the 500-2000 Hz range performed a two-alternative forced choice frequency discrimination task. The stimuli were short tones separated by either a 250-ms(short), 850-ms (medium), or 3000-ms (long) silent inter-interstimulus interval (ISI). Frequency discrimination thresholds were estimated using an adaptive staircase procedure. Although young listeners performed better than the elderly at all ISIs, the latter showed a dramatic elevation of discrimination thresholds at 250 ms, while the thresholds of the young subjects increased significantly at 3000 ms. These results suggest that the elderly may be especially vulnerable to the effects of masking produced by the second tone at the short interval, whereas the young listeners tend to be differentially affected by the trace decay at long ISI. The results are discussed in the framework of stimulus persistence hypothesis.