Robinson K, Gatehouse S
MRC Institute of Hearing Research, Royal Infirmary, Glasgow, Scotland.
Ear Hear. 1996 Apr;17(2):120-3. doi: 10.1097/00003446-199604000-00005.
Establish the test-retest reliability of loudness scaling using a bounded category rating method.
The individual loudness functions were investigated in three groups of listeners: seven normal-hearing listeners age 18 to 35 yr, five normal-hearing listeners aged 57 to 84 yr, and five listeners aged 54 to 82 yr with bilateral sloping sensorineural hearing loss. Test-retest reliability was investigated by determining the intralistener, between-session standard deviation.
The pattern of test-retest reliability was similar across all three groups. It improved as the intensity of the stimulus increased: 7 dB at the first quartile of the loudness function, and 3 dB at the third quartile. Two to four runs of the task appear to be sufficient to obtain a stable loudness function, and it was shown that an exponential function provided a better goodness of fit than a linear function (r2: 0.99 compared with 0.94).
Loudness scaling is a longer test than most conventional suprathreshold measures and requires special equipment. However, it has good test-retest reliability and provides more information on the loudness function that might be useful in the fitting of nonlinear hearing aids. The data show that an exponential function provides a good fit to the loudness growth data, and should probably be incorporated into fitting algorithms associated with loudness scaling.
使用有界类别评定法确定响度标度的重测信度。
在三组听众中研究个体响度函数：7名年龄在18至35岁的听力正常听众、5名年龄在57至84岁的听力正常听众以及5名年龄在54至82岁的双侧斜坡型感音神经性听力损失听众。通过确定听众内、不同测试时段间的标准差来研究重测信度。
所有三组的重测信度模式相似。随着刺激强度增加，重测信度得到改善：在响度函数的第一个四分位数处为7分贝，在第三个四分位数处为3分贝。进行两到四轮该任务似乎足以获得稳定的响度函数，并且结果表明指数函数比线性函数具有更好的拟合优度（决定系数r2：分别为0.99和0.94）。
响度标度是一项比大多数传统阈上测量耗时更长的测试，并且需要特殊设备。然而，它具有良好的重测信度，并且能提供更多关于响度函数的信息，这可能对非线性助听器的验配有用。数据表明指数函数能很好地拟合响度增长数据，并且可能应纳入与响度标度相关的验配算法中。
