FIGURE 3.

Stimuli from an experiment in which both the target and flanker contrasts were varied. The contrast of the target varied ([0.25, 0.5, 0.75, 1.0]). The contrast of the flankers was varied independently ([0, 0.25, 0.5, 0.75, 1.0]). (A) Example of a stimulus condition with high contrast flankers (1.0) and a low contrast target (0.25). The target is present in the left sub-panel and absent from the right sub-panel. (B) Example of a stimulus with a high contrast target (1.0) and low contrast flankers (0.25). Again, the left and right sub-panels differ by the presence vs. absence of the target. Only collinear flankers were used in this experiment.