Fig 1. Top row: three frames from the direct launching animation: the first frame, the frame of contact, and the final frame.

Bottom row: three frames from the distal animation involving a spatial gap: the first frame, the frame at which the first object stops moving, and the final frame. The delayed versions are indistinguishable except that the middle frame persisted for 5 s. The red square (in the actual animation) is shown as a filled black square and the green square as an unfilled black square. The actual animations are available at: http://www.psychology.siu.edu/bcs/facultypages/young/Research/Supplemental.html.