Click on the images to see a higher resolution version (for computer monitors).
For some images, a high-resolution image is provided to highlight details ( blue link ).

NOTE: For stimulus c) the participant reported the visible pattern but also faint, pulsating wavy edges of the black grid lines; these are visible  only on the high resolution image, not on the thumbnail.

NOTE: For stimulus d), the motion was reported as "continuous moving downward" in the pattern and velocity shown.