Tomoko Imura, Masaki Tomonaga, Akihiro Yagi
The effects of linear perspective on relative size discrimination in chimpanzees (Pan troglodytes) and humans (Homo sapiens).
Behavioural Processes, 77, 306-312, doi: 10.1016/j.beproc.2007.07.006
In this study, we tested the corridor illusion in three chimpanzees and five humans, applying a relative size discrimination task to assess pictorial depth perception using linear perspective. The subjects were required to choose the physically larger cylinder of two on a background containing drawn linear perspective cues. We manipulated both background and cylinder size in each trial. Our findings suggest that chimpanzees, like humans, exhibit the corridor illusion.
Chimpanzees, Corridor illusion, Linear perspective, Pictorial depth, Size judgment