Parker D M, Dutch S
Department of Psychology, Kings College, University of Aberdeen, Scotland.
Vision Res. 1987;27(8):1279-83. doi: 10.1016/0042-6989(87)90204-5.
Subjects estimated the perceived onset of sinusoidal gratings by adjusting a visual probe so that grating and probe were phenomenally simultaneous. The first experiment found that perceptual latency increased by an average of 21 msec over a range of 0.5-9.0 c/deg, or approximately 5 msec per octave of spatial frequency. A second experiment found, that when a fundamental frequency and its third harmonic at one third contrast are compared, a lag of between 21 and 25 msec for the higher frequency lower amplitude grating is obtained. These spatial frequency dependent delays are substantially lower than those reported using other methods.
受试者通过调整视觉探针来估计正弦光栅的感知起始时间，以使光栅和探针在现象上同时出现。第一个实验发现，在0.5 - 9.0周/度的范围内，感知潜伏期平均增加21毫秒，即每倍频程空间频率约增加5毫秒。第二个实验发现，当比较基频及其三分之一对比度的三次谐波时，高频低振幅光栅会有21至25毫秒的延迟。这些与空间频率相关的延迟显著低于使用其他方法报告的延迟。
