Long description

This is an illustration of the food competition paradigm (Hare et al., 2000). It shows two chimpanzees positioned opposite each other behind ‘guillotine doors’ to a central room. The doors are raised. Food has been placed in the centre of the room and is visible to both chimpanzees. The room also contains two occluders, but here these are not obscuring either chimpanzee's view of the food.