Morgan M J, Regan D
Vision Res. 1987;27(1):107-18. doi: 10.1016/0042-6989(87)90147-7.
Vernier and spatial interval thresholds were determined as a function of contrast, using thin bars with a Gaussian luminance profile. The previously reported contrast dependence of vernier acuity was confirmed, but contrast had a much smaller effect upon interval acuity. A subsidiary experiment showed that the relative contrast of the two bars in an interval discrimination could be randomly perturbed over trials without substantially reducing acuity. A model of interval discrimination is developed, including an opponent stage between hypothetical spatial coincidence detectors.
使用具有高斯亮度分布的细条，将游标和空间间隔阈值确定为对比度的函数。先前报道的游标敏锐度的对比度依赖性得到了证实，但对比度对间隔敏锐度的影响要小得多。一项辅助实验表明，在试验过程中，间隔辨别中两条细条的相对对比度可以随机扰动，而不会大幅降低敏锐度。开发了一种间隔辨别模型，包括假设的空间重合探测器之间的拮抗阶段。
