This stimulus is a dynamic sparse random dot stereogram (RDS) that modulates in depth using changing disparity (CD) cues without frontoparallel (FP) motion cues. The dots lie on either one or two disparity planes and the disparity of the plane is randomly moved toward or away from the observer over time.

Currently, the range of disparities is constrained to be centered around zero.

One each video frame, a new set of random dots is created, thus there is no intentional coherent motion of dots, and thus no intentional IOVD cues.



The stimulus is created by generating a random dot movie for the left eye (LE), and then copying and shifting the dots for placement in the right eye (RE). The amount of shift (disparity) varies over video frames (time). Thus, the shifted dots in the RE may fall outside the field of view, lowering the density of dots on either the left or right border of the RE image. This density artifact on the border has not been compensated for. This will not influence models that only process the center part of the stimulus. This imperfection would not be difficult to fix.