Zhou H, May J G
Department of Psychology, University of New Orleans, LA 70148.
Percept Psychophys. 1993 Feb;53(2):145-9. doi: 10.3758/bf03211724.
Checkerboards contain fundamental two-dimensional Fourier components oriented 45 degrees from the edges of individual checks. Previous studies have shown that contingent color aftereffects following adaptation to chromatic checkerboard stimuli were associated with the fundamental components rather than the edges. In the present experiments, we measured contingent color aftereffects, using the method of constant stimuli, after subjects adapted to unfiltered checkerboards and checkerboards with the fundamental Fourier components removed. The adaptation stimuli were magenta (or green) squares and green (or magenta) diamonds; the test stimuli were vertical or oblique sine-wave gratings with different saturations. After adaptation to unfiltered checkerboards, aftereffects contingent on the fundamental components were obtained. In contrast, after adaptation to filtered stimuli, aftereffects of smaller magnitude were found to be aligned with the edges. The data support the previous findings of spatial-frequency-contingent color aftereffects with checkerboard adaptation stimuli and indicate that the aftereffects can be associated with edges if the fundamental components of adaptation stimuli are removed by spatial filtering. We reexamined the possibility of color aftereffects induced by imagery of checkerboards. Contrary to the previous reports, no significant aftereffects were obtained.
棋盘包含与单个方格边缘呈45度角的基本二维傅里叶分量。先前的研究表明，适应彩色棋盘刺激后的视锥细胞颜色后效与基本分量而非边缘相关。在本实验中，我们在受试者适应未滤波棋盘和去除基本傅里叶分量的棋盘后，使用恒定刺激法测量视锥细胞颜色后效。适应刺激为品红色（或绿色）方块和绿色（或品红色）菱形；测试刺激为具有不同饱和度的垂直或倾斜正弦波光栅。在适应未滤波棋盘后，获得了与基本分量相关的后效。相比之下，在适应滤波刺激后，发现较小幅度的后效与边缘对齐。这些数据支持了先前关于棋盘适应刺激引起的空间频率视锥细胞颜色后效的研究结果，并表明如果通过空间滤波去除适应刺激的基本分量，后效可能与边缘相关。我们重新审视了棋盘图像诱发视锥细胞颜色后效的可能性。与先前的报告相反，未获得显著的后效。
