Examples of visual displays used in Experiments 1 and 2.

<p><b><i>a</i></b><b>)</b> The object (e.g., a toy fire truck) in the box for Experiment 1 was revealed (or not) by up-down animation of an occluder (e.g., a blue polka-dotted box). <b><i>b</i></b><b>)</b> In Experiment 2, one of three unique objects (e.g., a baby bottle) popped up from behind one of three highly distinctive boxes. Also see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0036399#pone.0036399.s001" target="_blank"><b>Videos S1</b></a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0036399#pone.0036399.s002" target="_blank"><b>S2</b></a> for examples of animated displays used in these studies.</p>