Abstract
Four baboons (Papio papio) were tested in a computerized two-alternative forced choice task in which partially occluded graphic stimuli were shown either on linear perspective backgrounds depicting a corridor or on uniformly black backgrounds. The results indicated that baboons complete partly occluded stimuli and that amodal completion is facilitated by the display of pictorial background depth cues. Inter-individual differences emerged in the ability to extrapolate three-dimensional information from two-dimensional visual information.
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Acknowledgements
The authors wish to thank Marc Martin and Monique Chiambretto for their technical support; this research was supported by the CNRS-OMLL research program and by the Sedsu-Nest-012984.
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The procedure employed in this research was given the full approval of the regional “comité d’éthique pour l’expérimentation animale.”
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Fagot, J., Barbet, I., Parron, C. et al. Amodal completion by baboons (Papio papio): contribution of background depth cues. Primates 47, 145–150 (2006). https://doi.org/10.1007/s10329-005-0165-5
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DOI: https://doi.org/10.1007/s10329-005-0165-5