Example (below) of six moving negative, moving non-negative, static negative and static non-negative trials employed
in our study published in Neuropsychologia (2009). This sequence is presented forming a loop. It reproduces the actual
temporal characteristics of the task, though they may vary depending on the characteristics of the computer in which this Flash animation is visualized. Please scroll the screen so the stimulus frame is completely visible. Tested in Internet Explorer, other browsers could not efficiently show the animation.

Note that the task required from subjects to categorize the central digits (those in second and third position) as concordant (both are odd or both are even) or discordant (one is odd and the other even) pressing different keys. They were also instructed to maintain their gaze in the center of the stimulus.

More details in the paper.