Fig. 3.
Examples of continuity violations involving occlusion events. A: At 2.5 months, infants are surprised if an object fails to become visible when passing between two screens placed a short distance apart (Aguiar & Baillargeon, 1999). B: Beginning at about 3 months, infants are surprised if an object fails to become visible when passing behind a screen whose lower edge is not continuous with the surface on which it rests, thus creating an opening between the screen and the surface (Aguiar & Baillargeon, 2002). C: Beginning at about 3.5 months, infants are surprised if a tall object fails to become visible when passing behind a short screen (Luo & Baillargeon, 2005). D: Beginning at about 7.5 months, infants are surprised when shown the following violation. Infants first see an object and a transparent occluder standing side-by-side. A large screen is raised to hide the display, and an experimenter’s gloved hand places the object behind the transparent occluder. The screen is then lowered to reveal the transparent occluder with no object visible behind it (Luo & Baillargeon, 2007).