Experiment 1 sample displays: In Experiment 1, two familiar objects were presented side by side, and observers’ task was to indicate which object was smaller or larger on the screen. The real-world size of the objects could either be congruent or incongruent with the presented size. Example displays are shown for congruent and incongruent conditions, for Experiment 1a (A) and Experiment 1b (B). In Experiment 1a, the big and small objects were matched by aspect ratio and their visual size was set by adjusting the diagonal extent relative to the size of the screen. In Experiment 1B, the visual size of the objects was set by adjusting the object pixel area relative to the area of the screen.