Video S2: Long Delay - Chimpanzee

Video S2: Long Delay (Study 1) – Chimpanzee. Experimenter 1 (E1) baits and fake-baits the two containers (in counterbalanced order across trials) while Experimenter 2 (E2) attracts the chimpanzee to the centered starting location on the other side of the room. Once the baiting is complete, the chimpanzee approaches the left (correct) container and E1 then gives the food. In initial learning trials the ape could self-correct if they initially made an incorrect choice, whereas in test trials one week later they could not. Correct side was counterbalanced across individuals.