Prosser S, Peronio M
Clinica Otorinolaringoiatrica, Università di Ferrara.
Acta Otorhinolaryngol Ital. 1997 Apr;17(2):87-92.
A group of 5 normal hearing subjects were studied to determine their perception of the duration of auditory stimuli applied at constant frequency and intensity. In particular, their ability to discriminate between a pair of stimuli was measured. The minimum perceptible difference in duration was evaluated as the Weber fraction (WF) and was a function of the different stimuli duration (from 200 to 3200 ms) and the different interstimulus intervals (from 20 to 7200 ms). In addition, the interference stemming from two different attention conditions was also tested. The WF tended to increase for the 200,400 ms stimuli while it remained unchanged (at around 0.1) for higher durations. On the other hand, the WF was not affected by the inter-stimulus interval although it increased significantly according to attention interference. While these results confirm that estimates of auditory stimuli use attention controlled mechanisms they also suggest that information regarding duration is a stable perception temporarily residing in the short-term auditory memory and that it is not particularly susceptible to temporal decay.
对5名听力正常的受试者进行了研究，以确定他们对以恒定频率和强度施加的听觉刺激持续时间的感知。特别地，测量了他们区分一对刺激的能力。将持续时间的最小可察觉差异评估为韦伯分数（WF），它是不同刺激持续时间（从200到3200毫秒）和不同刺激间隔（从20到7200毫秒）的函数。此外，还测试了来自两种不同注意力条件的干扰。对于200、400毫秒的刺激，WF倾向于增加，而对于更长的持续时间，它保持不变（约为0.1）。另一方面，WF不受刺激间隔的影响，尽管它根据注意力干扰显著增加。虽然这些结果证实了对听觉刺激的估计使用了注意力控制机制，但它们也表明，关于持续时间的信息是一种暂时存在于短期听觉记忆中的稳定感知，并且它对时间衰减不太敏感。
