Table 3. Parameters of the images used in the stimuli of both experiments. Relative contrast is the number of black pixels in the frame.

Image	1	2	3	4	5	6	7	8
Relative Contrast	250	230	518	545	500	211	545	211
Width (mm)	7	6	6	6	7	6	7	7

For the actual images used see Figure 1.