Dobie R A, Wilson M J
Department of Otolaryngology-Head and Neck Surgery, University of Texas Health Science Center, San Antonio 78284-7777, USA.
J Acoust Soc Am. 1995 May;97(5 Pt 1):3042-50. doi: 10.1121/1.411868.
Magnitude-squared coherence (MSC) was used to detect 40-Hz auditory-evoked potentials (AEPs) in a two-alternative forced-choice experiment. MSC performance was found to be better than that of ten human observers. Experienced observers did not perform better than naive observers. In a "yes-no" experiment, observers demonstrated large differences in criterion, with false-positive rates of 2%-20%. Observers also performed better when AEPs were presented in a 50-ms window (two response cycles) than when presented in a 205-ms window (eight response cycles), although total test time was the same; MSC performed equally well in both cases. MSC provides a useful and objective adjunct to visual detection of 40-Hz AEPs.
在一项二选一的强迫选择实验中，使用幅度平方相干（MSC）来检测40赫兹听觉诱发电位（AEP）。发现MSC的表现优于十名人类观察者。经验丰富的观察者并不比新手观察者表现更好。在“是-否”实验中，观察者在标准上表现出很大差异，假阳性率为2%-20%。当AEP在50毫秒窗口（两个反应周期）中呈现时，观察者的表现也比在205毫秒窗口（八个反应周期）中呈现时更好，尽管总测试时间相同；在这两种情况下，MSC的表现同样出色。MSC为视觉检测40赫兹AEP提供了一种有用且客观的辅助手段。
