Figure 4.

An illustration of how the Scintillating Starburst stimulus was constructed. Top row: nonbisecting stimuli, bottom row: bisecting stimuli. A: A single polygon—here, a heptagon, which we call a strand. B: Two heptagons with faces that bisect each other to form a {14/2} star polygon known as a tetradecagram, which we call a braid. C: Two concentric nonbisecting strands. D: Two braids scaled so they just touch, making up one wreath. E: Two concentric nonbisecting pairs of strands. F: Two concentric wreaths. G: Three concentric nonbisecting pairs of strands. H: Three concentric wreaths. This stimulus corresponds to the Scintillating Starburst stimulus shown in Figure 1, but on a white background and smaller.