Comparative literature provides conflicting findings whether animals experience amodal completion.
Five experiments were conducted to verify if baboons perceive partly occluded objects as complete. Although in experiment 5 the same 2AFC procedure was used as in experiment 4, completion was absent when the stimuli were shown with a computer graphic system. The results suggest that baboons share with humans the ability for amodal completion, but also underline some procedural factors that might affect the elicitation of this capacity.