Pigeon’s recognition of cartoons: effects of fragmentation, scrambling, and deletion of elements

Matsukawa, Atsuko; Inoue, Sana; Jitsumori, Masako

doi:10.1016/s0376-6357(03)00147-5

Cited by 38 publications

(21 citation statements)

References 25 publications

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“…Decrement of face discrimination abilities in inverted and scrambled conditions has been demonstrated, even if to a different extent, in many species, such as humans, e.g. [14], primates (reviewed in [70]), sheep [66] and pigeons [35]. In dogs, a deteriorative effect of the inversion on visual inspection of human face pictures has been previously found in a free viewing task [9] and using a visual paired comparison paradigm [11].…”

Section: Discussionmentioning

confidence: 99%

“…Scrambling affects mainly configural processing, but even part perception is affected to an extent that depends on the magnitude of the manipulation itself, e.g. [15], [35]. Visual discrimination is impaired by scrambling in humans [15] and rhesus monkeys [18] when looking at human faces; in contrast, pigeons are still able to discriminate cartoon characters [36], [37] and photographs of people [38] even if scrambled in tiny fragments.…”

Section: Introductionmentioning

confidence: 99%

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Part-Based and Configural Processing of Owner's Face in Dogs

et al. 2014

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Dogs exhibit characteristic looking patterns when looking at human faces but little is known about what the underlying cognitive mechanisms are and how much these are influenced by individual experience. In Experiment 1, seven dogs were trained in a simultaneous discrimination procedure to assess whether they could discriminate a) the owner's face parts (eyes, nose or mouth) presented in isolation and b) whole faces where the same parts were covered. Dogs discriminated all the three parts of the owner's face presented in isolation, but needed fewer sessions to reach the learning criterion for the eyes than for both nose and mouth. Moreover, covering the eyes region significantly disrupted face discriminability compared to the whole face condition while such difference was not found when the nose or mouth was hidden. In Experiment 2, dogs were presented with manipulated images of the owner's face (inverted, blurred, scrambled, grey-scale) to test the relative contribution of part-based and configural processing in the discrimination of human faces. Furthermore, by comparing the dogs enrolled in the previous experiment and seven ‘naïve’ dogs we examined if the relative contribution of part-based and configural processing was affected by dogs' experience with the face stimuli. Naïve dogs discriminated the owner only when configural information was provided, whereas expert dogs could discriminate the owner also when part-based processing was necessary. The present study provides the first evidence that dogs can discriminate isolated internal features of a human face and corroborate previous reports of salience of the eyes region for human face processing. Although the reliance on part-perception may be increased by specific experience, our findings suggest that human face discrimination by dogs relies mainly on configural rather than on part-based elaboration.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Part-Based and Configural Processing of Owner's Face in Dogs

et al. 2014

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“…Both pigeons and primates were shown to be able to learn a variety of these perceptual concepts and to transfer their performance to novel instances of the concept (e.g., Aust & Huber, 2002;Matsukawa, Inoue, & Jitsumori, 2004;Schrier & Brady, 1987;Vogels, 1999;Vonk & McDonald, 2002;.…”

Section: Basic-level Categorization In Animalsmentioning

confidence: 99%

Concept Learning in Animals

Zentall¹,

Wasserman²,

Lazareva³

et al. 2008

CCBR

166

141

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Generally speaking, the study of concepts in cognitive psychology is anthropocentric with respect to both content and theory. A broader comparative perspective on the various forms of concept learning not only provides a more inclusive view of conceptual behavior, but it also provides a more objective perspective from which to identify underlying processes. We suggest that several of the major varieties of conceptual classes claimed to be uniquely human are also exhibited by nonhuman animals. We present evidence for the formation of several sorts of conceptual stimulus classes by nonhuman animals: perceptual classes involving classification according to the shared attributes of objects, associative classes or functional equivalences in which stimuli form a class based on common associations, relational classes, in which the conceptual relationship between or among stimuli defines the class, and relations between relations, in which the conceptual (analogical) relationship is defined by the relation between classes of stimuli. We conclude that not only are nonhuman animals capable of acquiring a wide variety of concepts, but that the underlying processes that determine concept learning are also likely to be quite similar.

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“…Our most interesting result is that without a doubt the equally less inhibited response of both species in approaching the sparrowhawk painted with a violet-white chequered pattern. This result can be explained by the existence of a general concept of a bird, which has been repeatedly documented to be formed in birds (Ghosh et al 2004;Matsukawa et al 2004;Shettleworth 2010;Cook et al 2013). A violetwhite chequer-coloured sparrowhawk obviously does not match this concept.…”

Section: Discussionmentioning

confidence: 97%

Birds at the Winter Feeder do not Recognize an Artificially Coloured Predator

2016

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It is supposed that coloration may affect the recognition of predators by prey species; nevertheless, the significance of the coloration and its particular components in the recognition process remains unknown. We presented dummies of the European sparrowhawk (Accipiter nisus) with changed body coloration, but with all other typical features preserved (body size and shape, beak, eyes, legs), to great tits (Parus major) and blue tits (Cyanistes caeruleus) visiting a winter feeder. A pigeon (Columba livia f. domestica) dummy was used as a harmless control. Neither tit species showed passive avoidance in the presence of a dummy with an artificial, violet‐white chequered coloration. They obviously did not consider such an object to be a predator despite the presence of the raptor beak, eyes and talons. Sparrowhawk dummies with the coloration completely changed (altered with those of a harmless European robin) or with the typical colour feature removed (barred pattern on the underparts) were considered to be as dangerous as the unmodified sparrowhawk. We discuss the possibility that the effect of salient raptor‐like features such as beak shape, eye coloration, and leg and talons shape overwhelmed the effect of body coloration in these cases. Birds visiting the feeder probably were able to generalize the vigilance towards the sparrowhawk to other realistically coloured dummies, but not to the non‐natural dummy.

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Pigeon’s recognition of cartoons: effects of fragmentation, scrambling, and deletion of elements

Cited by 38 publications

References 25 publications

Part-Based and Configural Processing of Owner's Face in Dogs

Part-Based and Configural Processing of Owner's Face in Dogs

Concept Learning in Animals

Birds at the Winter Feeder do not Recognize an Artificially Coloured Predator

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