Localization performance with the Prinzmetal et al. (2008) stimuli: Probability of correct localization of a single stimulus on the right or left of fixation (vertical axis) versus a stimulus's Michelson contrast. (A) Triangles indicate performance for 10 observers with 11-cpd, 1.05° visual angle Gabors, as reported by Prinzmetal et al. (2008, accepted version). (B) Circles indicate performance for 9 observers with 7-cpd, 1.05° visual angle Gabors, as reported by Prinzmetal et al. (2008, published version). For comparison, we include the localization performance for 10 observers with 4-cpd, 2° visual angle Gabors at 4° eccentricity, as used by Carrasco, Ling, and Read (2004; squares).