Ueno T
J Opt Soc Am. 1979 Jul;69(7):1023-8. doi: 10.1364/josa.69.001023.
The reaction-time technique was applied to examine spatial summation or area-intensity reciprocity at suprathreshold levels in the fovea. A family of reaction time vs luminance curves was measured in two experiments, and the luminance required to produce a criterion reaction time was computed from these curves to estimate the extent of summation. The first experiment showed that the upper level of spatial summation, the Ricco area, defined for constant reaction time increases with decreasing luminance level and that the upper limit of temporal summation is independent of the change in target size. The second indicated that the Ricco area decreases with increasing pulse duration up to 20-30 ms and then remains constant.
采用反应时技术研究中央凹超阈值水平的空间总和或面积-强度倒数关系。在两个实验中测量了一系列反应时与亮度曲线，并根据这些曲线计算出产生标准反应时所需的亮度，以估计总和程度。第一个实验表明，对于恒定反应时定义的空间总和上限，即里科面积，随亮度水平降低而增加，且时间总和的上限与目标大小的变化无关。第二个实验表明，里科面积随脉冲持续时间增加至20 - 30毫秒而减小，然后保持恒定。
