Pitts Michael A, Troup Lucy J, Volbrecht Vicki J, Nerger Janice L
Department of Psychology, Colorado State University, Fort Collins, CO, USA.
J Vis. 2005 May 18;5(5):435-43. doi: 10.1167/5.5.4.
The effect of retinal illuminance (0.3-3.3 log td) on chromatic perceptive field size was investigated at 10 degrees eccentricity along the horizontal meridian of the temporal retina. Using the 4+1 color-naming procedure, observers described the hue and saturation of a series of monochromatic stimuli (440-660 nm, in 10-nm steps) of various test sizes (.098-5 degrees) after 30-min dark adaptation. Perceptive field sizes of the four elemental hues and the saturation component were estimated for each wavelength at each retinal illuminance. Results indicate that perceptive field sizes for blue, green, yellow, and saturation all decrease with increasing retinal illuminance; the perceptive field size for red is the smallest and invariant with intensity. The influence of rods on perceptive field size may account for some of the results; other factors are also considered.
在颞侧视网膜水平子午线10度偏心率处，研究了视网膜照度（0.3 - 3.3 log td）对色觉感知视野大小的影响。采用4 + 1颜色命名程序，观察者在30分钟暗适应后，描述一系列不同测试大小（0.098 - 5度）的单色刺激（440 - 660 nm，间隔10 nm）的色调和饱和度。针对每个视网膜照度下的每个波长，估计了四种基本色调和饱和度成分的感知视野大小。结果表明，蓝色、绿色、黄色和饱和度的感知视野大小均随视网膜照度增加而减小；红色的感知视野大小最小且不随强度变化。视杆细胞对感知视野大小的影响可能解释了部分结果；同时也考虑了其他因素。
