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The effects of linear perspective on relative size discrimination in chimpanzees (Pan troglodytes) and humans (Homo
Tomoko Imura1, Masaki Tomonaga, Akihiro Yagi
1Department of Psychology, Kwansei Gakuin University, 1-1-155 Uegahara, Nishinomiya, Hyogo 662-8501, Japan. imura@pri.kyoto-u.ac.jp
Abstract:
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.
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