Do Dogs See the Ponzo illusion?

Byosiere, Sarah‐Elizabeth; Feng, Lynna C.; Rutter, N; Woodhead, Jessica K.; Chouinard, Philippe A.; Howell, Tiffani J.

doi:10.26451/abc/.04.04.01.2017

Cited by 14 publications

(22 citation statements)

References 39 publications

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“…When presented with the "converging line" stimuli, re-positioned 90 degrees to create a vertical display, group performance was generally higher than the performance observed in horizontal presentations reported in Byosiere, Feng, Rutter, et al (2017).…”

Section: Ponzo Illusionmentioning

confidence: 66%

Illusion susceptibility in domestic dogs

et al. 2020

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Domestic dogs play many vital roles in human lives; however, relatively little is known about how they perceive the world visually. Given dogs’ recent popularity as a subject in cognitive and behavioural studies, it is important to understand how they visually interpret the world around them. One way to evaluate perception is to assess illusion susceptibility; specifically, how visual information is processed, interpreted and modified post‐retinally. While illusion susceptibility has been used across a variety of species to comparatively assess the similarities and differences in visual processing and perception, this relatively novel methodological approach has only recently been adapted to evaluate perception in domestic dogs. Here, we present a comprehensive overview of the findings from studies that have evaluated domestic dogs’ illusion susceptibility, highlighting the relevance of these results for those studying illusion susceptibility in animals as well as canine behaviour and cognition. More specifically, the ultimate goal of this review is to answer the questions: (a) Are dogs susceptible to visual illusions? (b) If so, are they susceptible to illusions in a way that parallels humans and/or other animals? (c) Are findings, within dogs, consistent and if not, how might these be interpreted and explained?

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Section: Ponzo Illusionmentioning

confidence: 66%

Illusion susceptibility in domestic dogs

et al. 2020

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“…This mechanism could potentially account for the response of the horse to Müller-Lyer illusion and explain why dogs and horses differ in this respect. Indeed, there is good evidence that horses, like humans and non-human primates, are sensitive to depth information contained in static pictures (Guinea baboon: [34]; horse [18]) while dogs use mainly other clues to estimate distance and show little sensitivity if any to pictorial depth cues [35,36].…”

Section: Discussionmentioning

confidence: 99%

Susceptibility to Size Visual Illusions in a Non-Primate Mammal (Equus caballus)

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Petrazzini

Bisazza

et al. 2020

Animals

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The perception of different size illusions is believed to be determined by size-scaling mechanisms that lead individuals to extrapolate inappropriate 3D information from 2D stimuli. The Muller-Lyer illusion represents one of the most investigated size illusions. Studies on non-human primates showed a human-like perception of this illusory pattern. To date, it is not clear whether non-primate mammals experience a similar illusory effect. Here, we investigated whether horses perceive the Muller-Lyer illusion by using their spontaneous preference for the larger portion of carrot. In control trials, we presented horses with two carrot sticks of different sizes, and in test trials, carrot sticks of identical size were shown to the subjects together with arrowheads made of plastic material and arranged in a way meant to elicit the Müller-Lyer illusion in human observers. In control trials, horses significantly discriminated between the smaller and larger carrot stick. When presented with the illusion, they showed a significant preference for the carrot that humans perceive as longer. Further control trials excluded the possibility that their choices were based on the total size of the carrot stick and the arrowheads together. The susceptibility of horses to this illusion indicates that the perceptual mechanisms underlying size estimation in perissodactyla might be similar to those of primates, notwithstanding the considerable evolutionary divergence in the visual systems of these two mammalian groups.

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“…To our knowledge, three studies have assessed geometric illusion susceptibility in domestic dogs (Byosiere et al, 2016;Byosiere et al 2017b;Miletto Petrazzini, Bisazza, & Agrillo, 2016) (see Fig. 2 for detailed descriptions of the illusions assessed).…”

Section: Visual Perception and Misperceptionmentioning

confidence: 99%

What do dogs (Canis familiaris) see? A review of vision in dogs and implications for cognition research

et al. 2017

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Over the last 20 years, a large amount of research has been conducted in an attempt to uncover the cognitive abilities of the domestic dog. While substantial advancements have been made, progress has been impeded by the fact that little is known about how dogs visually perceive their external environment. It is imperative that future research determines more precisely canine visual processing capabilities, particularly considering the increasing number of studies assessing cognition via paradigms requiring vision. This review discusses current research on visual cognition and emphasizes the importance of understanding dog visual processing. We review several areas of vision research in domestic dogs, such as sensitivity to light, visual perspective, visual acuity, form perception, and color vision, with a focus on how these abilities may affect performance in cognition tasks. Additionally, we consider the immense diversity seen in dog morphology and explore ways in which these physical differences, particularly in facial morphology, may result in, or perhaps even be caused by, different visual processing capacities in dogs. Finally, we suggest future directions for research in dog vision and cognition.

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Do Dogs See the Ponzo illusion?

Cited by 14 publications

References 39 publications

Illusion susceptibility in domestic dogs

Illusion susceptibility in domestic dogs

Susceptibility to Size Visual Illusions in a Non-Primate Mammal (Equus caballus)

What do dogs (Canis familiaris) see? A review of vision in dogs and implications for cognition research

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