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Perception of partly occluded figures by baboons (Papio papio)

Abstract : Comparative literature provides conflicting findings whether animals experience amodal completion. Five experiments were conducted to verify if baboons perceive partly occluded objects as complete. The first three experiments used a go/no-go procedure and a video monitor for stimulus presentation. These experiments failed to reveal amodal completion, suggesting that the stimuli were processed as 2-D images rather than 3-D objects. In contrast, completion was demonstrated in a fourth experiment with cardboard stimuli in a two-alternative forced-choice (2AFC) discrimination task presented in a Wisconsin General Test Apparatus. 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.
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Contributor : Jean-Baptiste Melmi Connect in order to contact the contributor
Submitted on : Friday, January 20, 2017 - 10:10:59 AM
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C Deruelle, I Barbet, D Depy, J Fagot. Perception of partly occluded figures by baboons (Papio papio). Perception, SAGE Publications, 2000, 29 (12), pp.1483-1497. ⟨10.1068/p3071⟩. ⟨hal-01441698⟩



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