A MAXIMUM-LIKELIHOOD METHOD FOR ESTIMATING THRESHOLDS IN A YES NO TASK
A MAXIMUM-LIKELIHOOD METHOD FOR ESTIMATING THRESHOLDS IN A YES NO TASK
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DOI：
10.1121/1.406696
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发表时间：
1993-04-01
影响因子：
2.4
通讯作者：
GREEN, DM
中科院分区：
文献类型：
--
作者：
GREEN, DM
提出了一种在是非任务中估计阈值的最大似然方法。在这个过程的计算机模拟中，它表明，阈值估计的变异性是由密度的假设测试一个固定的范围，或严重的心理测量函数的斜率的错误估计的影响很小。阈值也在很大程度上独立于信号的起始值。阈值估计的标准偏差似乎随着试验次数的平方根而减小，如果在阈值估计中仅使用12次试验，则可能有2到3 dB的标准偏差。数据是使用5天测试的人类听众呈现的。根据12次试验，每天在六个听力频率中的每一个频率下进行两次阈值估计。平均数据看起来是合理的，并且所测量的阈值的标准偏差约为3dB。使用此程序，只需不到3分钟即可测量单耳的听力图。
A maximum-likelihood procedure for estimating threshold values in a yes-no task is presented. In computer simulations of this procedure, it is demonstrated that the variability of the threshold estimates is little affected by the density of the hypotheses tested for a fixed range, or by serious misestimates of the slope of the psychometric functions. The threshold value is also largely independent of the starting value of the signal. The standard deviation of the threshold estimates appears to decrease with the square root of the number of trials, with a 2- to 3-dB standard deviation possible if only 12 trials are used in the threshold estimates. Data are presented using human listeners tested on 5 days. Two threshold estimates, based on 12 trials, were made at each of the six audiometric frequencies on each day. The mean data appear sensible, and the standard deviation of the measured thresholds is about 3 dB. Using this procedure, it takes less than 3 min to measure the audiogram for a single ear.