Bennett P J
Department of Psychology, University of Toronto, ON, Canada.
Percept Psychophys. 1993 Mar;53(3):292-304. doi: 10.3758/bf03205184.
Previous studies have shown that 180 degrees relative phase shifts in f + 2f gratings are discriminated when the cosine or the sine component of the shift exceeds some criterion (Bennett & Banks, 1987; Field & Nachmias, 1984). The current experiments demonstrate that this result holds for other two-component gratings, provided that the components are within two to three octaves of each other. For frequency differences greater than two to three octaves, phase-reversal discrimination is impossible. A simple model that discriminates phase shifts on the basis of changes in the responses of even- and odd-symmetric spatial filters can account for the results.
先前的研究表明，当f + 2f光栅中的180度相对相移的余弦或正弦分量超过某个标准时，就能被辨别出来（贝内特和班克斯，1987年；菲尔德和纳赫米亚斯，1984年）。当前的实验表明，只要各分量彼此在两到三个八度范围内，该结果对于其他双分量光栅也成立。对于大于两到三个八度的频率差异，相位反转辨别是不可能的。一个基于偶对称和奇对称空间滤波器响应变化来辨别相移的简单模型可以解释这些结果。
