title: The effects of linear perspective on relative size discrimination in chimpanzees (Pan troglodytes) and humans (Homo sapiens).
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.
authors.affiliation: Department of Psychology, Kwansei Gakuin University, 1-1-155 Uegahara, Nishinomiya, Hyogo 662-8501, Japan. imura@pri.kyoto-u.ac.jp
authors.forename: Tomoko
authors.initials: T
authors.lastname: Imura
authors.forename: Masaki
authors.initials: M
authors.lastname: Tomonaga
authors.forename: Akihiro
authors.initials: A
authors.lastname: Yagi
mesh_terms: D000328:Adult; D000818:Animals; D015350:Contrast Sensitivity; D003867:Depth Perception; D004192:Discrimination, Psychological; D004215:Distance Perception; D005260:Female; D006801:Humans; D008297:Male; D009903:Optical Illusions; D010775:Photic Stimulation; D012016:Reference Values; D012858:Size Perception; D013028:Space Perception; D013045:Species Specificity