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Dogs (Canis lupus familiaris) are susceptible to the Kanizsa's triangle illusion.
| Content Provider | Europe PMC |
|---|---|
| Author | Lõoke, Miina Marinelli, Lieta Guérineau, Cécile Agrillo, Christian Mongillo, Paolo |
| Abstract | The ability to complete partially missing contours is widespread across the animal kingdom, but whether this extends to dogs is still unknown. To address this gap in knowledge, we assessed dogs’ susceptibility to one of the most common contour illusions, the Kanizsa’s triangle. Six dogs were trained to discriminate a triangle from other geometrical figures using a two-alternative conditioned discrimination task. Once the learning criterion was reached, dogs were presented with the Kanizsa’s triangle and a control stimulus, where inducers were rotated around their centre, so as to disrupt what would be perceived as a triangle by a human observer. As a group, dogs chose the illusory triangle significantly more often than control stimuli. At the individual level, susceptibility to the illusion was shown by five out of six dogs. This is the first study where dogs as a group show susceptibility to a visual illusion in the same manner as humans. Moreover, the analyses revealed a negative effect of age on susceptibility, an effect that was also found in humans. Altogether, this suggests that the underling perceptual mechanisms are similar between dogs and humans, and in sharp contrast with other categories of visual illusions to which the susceptibility of dogs has been previously assessed. |
| Related Links | https://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC8904331&blobtype=pdf |
| ISSN | 14359448 |
| Journal | Animal Cognition [Anim Cogn] |
| Volume Number | 25 |
| DOI | 10.1007/s10071-021-01533-0 |
| PubMed Central reference number | PMC8904331 |
| Issue Number | 1 |
| PubMed reference number | 34269930 |
| e-ISSN | 14359456 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2021-07-16 |
| Publisher Place | Berlin/Heidelberg |
| Access Restriction | Open |
| Rights License | Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. © The Author(s) 2021 |
| Subject Keyword | Dog Illusory contours Perception Vision Visual illusions |
| Content Type | Text |
| Resource Type | Article |
| Subject | Experimental and Cognitive Psychology Ecology, Evolution, Behavior and Systematics |
