FIGURE 15: Masking paradigm in temporal dynamics of brightness study [Paradiso & Nakayama (1991)]

(a) Brightness suppression of a disk-shaped target by a mask consisting of a grid of thin lines. The target and mask are each presented for 16msec. Optimizing the temporal delay between the stimuli yields a percept in which the brightness in a large central area of the disk is greatly suppressed. (b) Brightness suppression is highly dependent on the arrangement of contours in the mask.