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| Author | Wathan, J.; Burrows, A.M.; Waller, B.M.; McComb, K. | ||||
| Title | EquiFACS: The Equine Facial Action Coding System | Type | Journal Article | ||
| Year | 2015 | Publication | PLoS ONE | Abbreviated Journal | PLoS ONE |
| Volume | 10 | Issue | 8 | Pages | e0131738 |
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| Abstract | <p>Although previous studies of horses have investigated their facial expressions in specific contexts, e.g. pain, until now there has been no methodology available that documents all the possible facial movements of the horse and provides a way to record all potential facial configurations. This is essential for an objective description of horse facial expressions across a range of contexts that reflect different emotional states. Facial Action Coding Systems (FACS) provide a systematic methodology of identifying and coding facial expressions on the basis of underlying facial musculature and muscle movement. FACS are anatomically based and document all possible facial movements rather than a configuration of movements associated with a particular situation. Consequently, FACS can be applied as a tool for a wide range of research questions. We developed FACS for the domestic horse (<italic>Equus caballus</italic>) through anatomical investigation of the underlying musculature and subsequent analysis of naturally occurring behaviour captured on high quality video. Discrete facial movements were identified and described in terms of the underlying muscle contractions, in correspondence with previous FACS systems. The reliability of others to be able to learn this system (EquiFACS) and consistently code behavioural sequences was high?and this included people with no previous experience of horses. A wide range of facial movements were identified, including many that are also seen in primates and other domestic animals (dogs and cats). EquiFACS provides a method that can now be used to document the facial movements associated with different social contexts and thus to address questions relevant to understanding social cognition and comparative psychology, as well as informing current veterinary and animal welfare practices.</p> | ||||
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| Publisher | Public Library of Science | Place of Publication | Editor | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5973 | ||
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| Author | Proops, L.; McComb, K.; Reby, D. | ||||
| Title | Cross-modal individual vocal recognition in the domestic horse | Type | Conference Article | ||
| Year | 2008 | Publication | IESM 2008 | Abbreviated Journal | |
| Volume | Issue | Pages | |||
| Keywords | social cognition, animal-human interaction, horses, attention | ||||
| Abstract | Horses fulfill many of the criteria for a species in which it would be adaptive to be capable of individual recognition: they are highly social, form strong and long lasting bonds, their affiliations are rarely kin based, they have a fission-fusion social structure and they possess inter and intra-group dominance hierarchies. We used a novel cross-modal, expectancy violation paradigm to provide the first systematic evidence that a non-human animal – the domestic horse- is capable of cross modal recognition. We believe this paradigm could provide an ideal way to study individual recognition across a wide range of species. For full published details see: Proops L, McComb K, Reby D (2009) Cross-modal individual recognition in domestic horses (Equus caballus). Proc Natl Acad Sci U S A 106: 947-951. |
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| Address | Centre for Mammal Vocal Communication Research, Psychology department, | ||||
| Corporate Author | Proops, L | Thesis | |||
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| Area | Expedition | Conference | IESM 2008 | ||
| Notes | Talk 15 min IESM 2008 | Approved | yes | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4469 | ||
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| Author | Proops, L.; McComb, K.; Reby, D. | ||||
| Title | Horse-human interactions: Attention attribution and the use of human cues by domestic horses (Equus caballus). | Type | Conference Article | ||
| Year | 2008 | Publication | IESM 2008 | Abbreviated Journal | |
| Volume | Issue | Pages | |||
| Keywords | social cognition; animal-human interaction; horses; attention | ||||
| Abstract | Recent research has shown that domestic dogs are particularly good at reading human attentional cues, often outperforming chimpanzees and hand reared wolves [1, 2]. It has been suggested that the close evolutionary relationship between humans and dogs has led to the development of this ability, however very few other species have been studied [3]. We tested the ability of 24 domestic horses to discriminate between an attentive and inattentive person when choosing whom to approach for food. While the attentive person faced forwards, the inattentive person either stood with their body turned 180° away from the subject (body orientation condition), stood with their body facing forwards but their head facing away (head orientation condition) or stood facing forwards but with their eyes closed (eyes closed condition). A fourth, mixed condition was included where the attentive person stood with their body facing away from the subjects but their head turned towards the subject while the inattentive person stood with their body facing the subject but their head turned away. Horses chose the attentive person significantly more often using the body cue (n = 24, k = 19, p = 0.003), the head cue (n = 24, k = 18, p = 0.011), and the eye cue (n = 24, k = 19, p = 0.003) but not the mixed cue (n = 24, k = 13, p = 0.42). In an additional pilot study, horses were tested in an object choice task. A human experimenter cued one of two buckets by either tapping the bucket (tap condition), orienting their body towards the bucket and pointing (body and point condition), pointing while facing forwards (point condition) or orienting their body towards the bucket (body condition). If the subjects chose the correct bucket they were rewarded. Subjects were able to use the tap cue (n = 31, k = 21, p = 0.035), body + point cue (n= 31, k = 21, p = 0.035) and the point cue (n = 30, k = 21, p = 0.021) but not the body cue (n = 31, k = 11, p = 0.076). These results taken together suggest that domestic horses are also very sensitive to human attentional cues, including gaze. Keywords: social cognition, animal-human interaction, horses, attention attribution, domestication 1. Hare, B., Brown, M., Williamson, C., and Tomasello, M. (2002). The domestication of social cognition in dogs. Science 298, 1634-1636. 2. Gacsi, M., Miklosi, A., Varga, O., Topal, J., and Csanyi, V. (2004). Are readers of our face readers of our minds` Dogs (Canis familiaris) show situation-dependent recognition of human’s attention. Animal Cognition 7, 144-153. 3. Hare, B., and Tomasello, M. (2005). Human-like social skills in dogs? Trends Cogn. Sci. 9, 439-444. |
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| Corporate Author | Proops, L. | Thesis | |||
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| Area | Expedition | Conference | IESM 2008 | ||
| Notes | Poster IESM 2008 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4502 | ||
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| Author | Proops, L.; McComb, K.; Reby, D. | ||||
| Title | Cross-modal individual recognition in domestic horses (Equus caballus) | Type | Journal Article | ||
| Year | 2009 | Publication | Proceedings of the National Academy of Sciences of the United States of America | Abbreviated Journal | Proc. Natl. Acad. Sci. U.S.A. |
| Volume | 106 | Issue | 3 | Pages | 947-951 |
| Keywords | animal cognition vocal communication social behavior playback experiment expectancy violation | ||||
| Abstract | Individual recognition is considered a complex process and, although it is believed to be widespread across animal taxa, the cognitive mechanisms underlying this ability are poorly understood. An essential feature of individual recognition in humans is that it is cross-modal, allowing the matching of current sensory cues to identity with stored information about that specific individual from other modalities. Here, we use a cross-modal expectancy violation paradigm to provide a clear and systematic demonstration of cross-modal individual recognition in a nonhuman animal: the domestic horse. Subjects watched a herd member being led past them before the individual went of view, and a call from that or a different associate was played from a loudspeaker positioned close to the point of disappearance. When horses were shown one associate and then the call of a different associate was played, they responded more quickly and looked significantly longer in the direction of the call than when the call matched the herd member just seen, an indication that the incongruent combination violated their expectations. Thus, horses appear to possess a cross-modal representation of known individuals containing unique auditory and visual/olfactory information. Our paradigm could provide a powerful way to study individual recognition across a wide range of species. | ||||
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| Notes | 10.1073/pnas.0809127105 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4689 | ||
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| Author | Proops, L.; McComb, K. | ||||
| Title | Attributing attention: the use of human-given cues by domestic horses (Equus caballus) | Type | Journal Article | ||
| Year | 2010 | Publication | Animal Cognition | Abbreviated Journal | Anim. Cogn. |
| Volume | 13 | Issue | 2 | Pages | 197-205 |
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| Abstract | Abstract Recent research has shown that domestic dogs are particularly good at determining the focus of human attention, often outperforming chimpanzees and hand-reared wolves. It has been suggested that the close evolutionary relationship between humans and dogs has led to the development of this ability; however, very few other domestic species have been studied. We tested the ability of 36 domestic horses to discriminate between an attentive and inattentive person in determining whom to approach for food. The cues provided were body orientation, head orientation or whether the experimenters’ eyes were open or closed. A fourth, mixed condition was included where the attentive person stood with their body facing away from the subjects but their head turned towards the subject while the inattentive person stood with their body facing the subject but their head turned away. Horses chose the attentive person significantly more often using the body cue, head cue, and eye cue but not the mixed cue. This result suggests that domestic horses are highly sensitive to human attentional cues, including gaze. The possible role of evolutionary and environmental factors in the development of this ability is discussed. | ||||
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| Call Number | Equine Behaviour @ team @ | Serial | 4984 | ||
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| Author | Proops, L.; McComb, K. | ||||
| Title | Cross-modal individual recognition in domestic horses (Equus caballus) extends to familiar humans | Type | Journal Article | ||
| Year | 2012 | Publication | Proceedings of the Royal Society B: Biological Sciences | Abbreviated Journal | |
| Volume | 279 | Issue | 1741 | Pages | 3131-3138 |
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| Abstract | It has recently been shown that some non-human animals can cross-modally recognize members of their own taxon. What is unclear is just how plastic this recognition system can be. In this study, we investigate whether an animal, the domestic horse, is capable of spontaneous cross-modal recognition of individuals from a morphologically very different species. We also provide the first insights into how cross-modal identity information is processed by examining whether there are hemispheric biases in this important social skill. In our preferential looking paradigm, subjects were presented with two people and playbacks of their voices to determine whether they were able to match the voice with the person. When presented with familiar handlers subjects could match the specific familiar person with the correct familiar voice. Horses were significantly better at performing the matching task when the congruent person was standing on their right, indicating marked hemispheric specialization (left hemisphere bias) in this ability. These results are the first to demonstrate that cross-modal recognition in animals can extend to individuals from phylogenetically very distant species. They also indicate that processes governed by the left hemisphere are central to the cross-modal matching of visual and auditory information from familiar individuals in a naturalistic setting. | ||||
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| Call Number | Equine Behaviour @ team @ | Serial | 5616 | ||
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| Author | McComb, K.; Shannon, G.; Durant, S.M.; Sayialel, K.; Slotow, R.; Poole, J.; Moss, C. | ||||
| Title | Leadership in elephants: the adaptive value of age | Type | Journal Article | ||
| Year | 2011 | Publication | Proceedings of the Royal Society B: Biological Sciences | Abbreviated Journal | Proc. R. Soc. Lond. B. |
| Volume | 278 | Issue | 1722 | Pages | 3270-3276 |
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| Abstract | The value of age is well recognized in human societies, where older individuals often emerge as leaders in tasks requiring specialized knowledge, but what part do such individuals play in other social species? Despite growing interest in how effective leadership might be achieved in animal social systems, the specific role that older leaders may play in decision-making has rarely been experimentally investigated. Here, we use a novel playback paradigm to demonstrate that in African elephants (Loxodonta africana), age affects the ability of matriarchs to make ecologically relevant decisions in a domain critical to survival—the assessment of predatory threat. While groups consistently adjust their defensive behaviour to the greater threat of three roaring lions versus one, families with younger matriarchs typically under-react to roars from male lions despite the severe danger they represent. Sensitivity to this key threat increases with matriarch age and is greatest for the oldest matriarchs, who are likely to have accumulated the most experience. Our study provides the first empirical evidence that individuals within a social group may derive significant benefits from the influence of an older leader because of their enhanced ability to make crucial decisions about predatory threat, generating important insights into selection for longevity in cognitively advanced social mammals. | ||||
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| Call Number | Equine Behaviour @ team @ | Serial | 5652 | ||
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| Author | Proops, L.; Rayner, J.; Taylor, A.M.; McComb, K. | ||||
| Title | The Responses of Young Domestic Horses to Human-Given Cues | Type | Journal Article | ||
| Year | 2013 | Publication | PLoS ONE | Abbreviated Journal | PLoS ONE |
| Volume | 8 | Issue | 6 | Pages | e67000 EP - |
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| Abstract | <p>It has been suggested that the process of domestication, at least in some species, has led to an innate predisposition to be skilled at reading human communicative and attentional cues. Adult domestic horses (<italic>Equus caballus</italic>) are highly sensitive to subtle bodily cues when determining if a person is attending to them but they are less adept at using human communicative cues in object choice tasks. Here we provide the first study into the ontogeny of such skills in order to gain insights into the mechanisms underlying these abilities. Compared with adult horses, youngsters under the age of three could use body orientation but not more subtle cues such as head movement and open/closed eyes to correctly choose an attentive person to approach for food. Across two object choice experiments, the performance of young horses was comparable to that of adult horses – subjects were able to correctly choose a rewarded bucket using marker placement, pointing and touching cues but could not use body orientation, gaze, elbow pointing or tapping cues. Taken together these results do not support the theory that horses possess an innate predisposition to be particularly skilled at using human cues. Horses' ability to determine whether humans are attending to them using subtle body cues appears to require significant experience to fully develop and their perhaps less remarkable use of limited cues in object choice tasks, although present at a much earlier age, is likely to reflect a more general learning ability related to stimulus enhancement rather than a specific ‘human-reading’ skill.</p> | ||||
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| Publisher | Public Library of Science | Place of Publication | Editor | ||
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| Call Number | Equine Behaviour @ team @ | Serial | 5676 | ||
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| Author | McComb, K. | ||||
| Title | Social cognition and emotional awareness: studies on elephants and horses | Type | Conference Article | ||
| Year | 2015 | Publication | Proceedings of the 3. International Equine Science Meeting | Abbreviated Journal | Proc. 3. Int. Equine. Sci. Mtg |
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| Corporate Author | McComb, K. | Thesis | |||
| Publisher | Xenophon Publishing | Place of Publication | Wald | Editor | Krueger, K. |
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| Series Editor | Series Title | Abbreviated Series Title | Proc. 3. Int. Equine. Sci. Mtg | ||
| Series Volume | in prep | Series Issue | Edition | ||
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ISBN | 978-3-95625-000-2 | Medium | ||
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| Notes | Id - | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 5800 | ||
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| Author | Smith, A.V.; Proops, L.; Grounds, K.; Wathan, J.; McComb, K. | ||||
| Title | Functionally relevant responses to human facial expressions of emotion in the domestic horse (Equus caballus) | Type | Journal Article | ||
| Year | 2016 | Publication | Biology Letters | Abbreviated Journal | Biol. Lett. |
| Volume | 12 | Issue | 2 | Pages | |
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| Abstract | Whether non-human animals can recognize human signals, including emotions, has both scientific and applied importance, and is particularly relevant for domesticated species. This study presents the first evidence of horses' abilities to spontaneously discriminate between positive (happy) and negative (angry) human facial expressions in photographs. Our results showed that the angry faces induced responses indicative of a functional understanding of the stimuli: horses displayed a left-gaze bias (a lateralization generally associated with stimuli perceived as negative) and a quicker increase in heart rate (HR) towards these photographs. Such lateralized responses towards human emotion have previously only been documented in dogs, and effects of facial expressions on HR have not been shown in any heterospecific studies. Alongside the insights that these findings provide into interspecific communication, they raise interesting questions about the generality and adaptiveness of emotional expression and perception across species. | ||||
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| Call Number | Equine Behaviour @ team @ | Serial | 6010 | ||
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