Bonato F, Cataliotti J
Saint Peter's College, Department of Psychology, Jersey City, NJ 07306, USA.
Percept Psychophys. 2000 Feb;62(2):341-9. doi: 10.3758/bf03205554.
Observers adjusted the luminance of a target region until it began to appear self-luminous, or glowing. In Experiment 1, the target was either a face-shaped region (figure) or a non-face-shaped region (ground) of identical area that appeared to be the face's background. In Experiment 2, the target was a square or a trapezoid of identical area that appeared as a tilted rectangle. In Experiment 3, the target was a square surrounded by square, circular, or diamond-shaped elements. Targets that (1) were perceived as figures, (2) were phenomenally small in area, or (3) did not group well with other elements in the array because of shape appeared self-luminous at significantly lower luminance levels. These results indicate that like lightness perception, the luminosity threshold is influenced by perceptual organization and is not based on low-level retinal processes alone.
观察者调整目标区域的亮度，直到它开始呈现出自发光或发光的状态。在实验1中，目标是一个与脸部背景面积相同的脸部形状区域（图形）或非脸部形状区域（背景）。在实验2中，目标是一个与倾斜矩形面积相同的正方形或梯形。在实验3中，目标是一个被正方形、圆形或菱形元素包围的正方形。那些（1）被视为图形、（2）在面积上明显较小或（3）由于形状原因与阵列中的其他元素组合不佳的目标，在显著更低的亮度水平下就会呈现出自发光状态。这些结果表明，与明度感知一样，发光阈值受知觉组织的影响，并非仅基于视网膜的低级过程。
