Examples of stimuli tested

Below is an illustration of the stimuli in the AVI movie (3 Mb). The stimuli are sinusoidally counterphasing (changing sign) across a static border (2 Hz, 16 frames/cyc). Static surfaces which do not change in luminance are marked by red hatches. Peak-to-peak contrasts for Real, Cornsweet, and Narrow Real stimuli are 10, 20, and 10%, respectively.