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Merkies, K.; McKechnie, M.J.; Zakrajsek, E. |
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Title |
Behavioural and physiological responses of therapy horses to mentally traumatized humans |
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2018 |
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Applied Animal Behaviour Science |
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Equine-assisted therapy; Ptsd; Horse; Behaviour; Cortisol; Heart rate |
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The benefits to humans of equine-assisted therapy (EAT) have been well-researched, however few studies have analyzed the effects on the horse. Understanding how differing mental states of humans affect the behaviour and response of the horse can assist in providing optimal outcomes for both horse and human. Four humans clinically diagnosed and under care of a psychotherapist for Post-Traumatic Stress Disorder (PTSD) were matched physically to four neurotypical control humans and individually subjected to each of 17 therapy horses loose in a round pen. A professional acting coach instructed the control humans in replicating the physical movements of their paired PTSD individual. Both horses and humans were equipped with a heart rate (HR) monitor recording HR every 5secs. Saliva samples were collected from each horse 30 min before and 30 min after each trial to analyze cortisol concentrations. Each trial consisted of 5 min of baseline observation of the horse alone in the round pen after which the human entered the round pen for 2 min, followed by an additional 5 min of the horse alone. Behavioural observations indicative of stress in the horse (gait, head height, ear orientation, body orientation, distance from the human, latency of approach to the human, vocalizations, and chewing) were retrospectively collected from video recordings of each trial and analyzed using a repeated measures GLIMMIX with Tukey's multiple comparisons for differences between treatments and time periods. Horses moved slower (p < 0.0001), carried their head lower (p < 0.0001), vocalized less (p < 0.0001), and chewed less (p < 0.0001) when any human was present with them in the round pen. Horse HR increased in the presence of the PTSD humans, even after the PTSD human left the pen (p < 0.0001). Since two of the PTSD/control human pairs were experienced with horses and two were not, a post-hoc analysis showed that horses approached quicker (p < 0.016) and stood closer (p < 0.0082) to humans who were experienced with horses. Horse HR was lower when with inexperienced humans (p < 0.0001) whereas inexperienced human HR was higher (p < 0.0001). Horse salivary cortisol did not differ between exposure to PTSD and control humans (p > 0.32). Overall, behavioural and physiological responses of horses to humans are more pronounced based on human experience with horses than whether the human is diagnosed with a mental disorder. This may be a reflection of a directness of movement associated with humans who are experienced with horses that makes the horse more attentive. It appears that horses respond more to physical cues from the human rather than emotional cues. This knowledge is important in tailoring therapy programs and justifying horse responses when interacting with a patient in a therapy setting. |
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0168-1591 |
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Equine Behaviour @ team @ |
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6385 |
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Author |
Krueger., K.; Farmer, K. |
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Title |
Social learning in Horses: Differs from individual learning only in the learning stimulus and not in the learning mechanisms |
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2018 |
Publication |
14th Meeting of the Internatinoal Society for Equitation Science |
Abbreviated Journal |
14th Meeting ISES |
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horse; individual learning; learning mechanisms; learning stimuli; social learning |
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Equine welfare can be enhanced by applying species specific training. This may incorporate social learning, as horses are highly social and social stimuli are of primary importance. Social learning is comparable to individual learning in its learning mechanisms, differing primarily in the way it is stimulated. Our initial study showed that horses of different breeds (N = 38) follow humans after observing other horses doing so, but only if the observed horse was familiar to and higher ranking than the observer (Fisher's exact test: N = 12, P = 0.003). A second study showed that horses and ponies (N = 25) learned to pull a rope to open a feeding apparatus after observing demonstrations by conspecifics, again, only if the demonstrating horse was older and higher ranking than the observer (Fisher's combination test, N = 3, v2 = 27.71, p = 0.006). Our third approach showed that horses and ponies (N = 24) learned to press a switch to open a feeding apparatus after observing a familiar person (GzLM: N = 24, z = 2.33, P = 0.02). Most recently, we confronted horses and ponies (N = 50) with persons demonstrating different techniques for opening a feeding apparatus. In this study we investigated whether the horses would copy the demonstrators' techniques or apply their own. Here only some horses copied the technique, and most of the successful learners used their mouths irrespective of the demonstrators' postures (Chi Square Test: N = 40, df = 2, χ2 = 31.4, p < 0.001). In all the approaches social stimuli elicited learning processes in the test horses, while only a few individuals in the control groups mastered the tasks by individual learning. The following behaviour observed in the initial study may have been facilitated by a social stimuli (social facilitation), and the opening of the feed boxes in the subsequent studies appear to be mostly the result of enhancement (social enhancement). Some horses may have used the social stimuli at first and continued their learning process by individual trial and error. However, the horses were also selective in whom and some in how to copy. This may have been conditioned (socially conditioned) or the result of simple forms of reasoning on the reliability of the particular information provided by demonstrators of certain social ranks or social positions, as high ranking and familiar horses and familiar persons were copied and some imitated exactly.
Lay person message: Traditional riding instructions suggest that horses learn by observing other horses. For example, older, more experienced driving horses are used for initial training of young driving horses. We have shown that horses indeed use learning stimuli provided by other horse, as well as by humans. Horses readily accept stimuli observed in high ranking and familiar horses, and familiar persons. Such stimuli elicit learning processes which are comparable to individual learning. We suggest applying social learning whenever possible, as it is much faster and less stressful than individual learning, where learners experience negative outcomes in trial and error learning. |
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Equine Behaviour @ team @ |
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6405 |
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Author |
Krueger, K. |
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Title |
Perissodactyla Cognition |
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2017 |
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Encyclopedia of Animal Cognition and Behavior |
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1-10 |
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Springer International Publishing |
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Cham |
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Vonk, J.; Shackelford, T. |
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978-3-319-47829-6 |
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Equine Behaviour @ team @ Krueger2017 |
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6187 |
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Krueger, K.; Marr, I.; Farmer, K. |
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Equine Cognition |
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2017 |
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Encyclopedia of Animal Cognition and Behavior |
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1-11 |
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Springer International Publishing |
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Vonk, J.; Shackelford, T. |
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Equine Behaviour @ team @ Krueger2017 |
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6181 |
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Creswell, J.W. |
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Research design |
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2014 |
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XXIX, 273 Seiten |
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Sage |
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Los Angeles |
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qualitative, quantitative, and mixed methods approaches |
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978-1-4522-7461-4 |
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Equine Behaviour @ team @ |
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6184 |
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Pongrácz |
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Equine Behaviour @ team @ |
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6199 |
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Kaczensky, P.; Huber, K. |
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The Use of High Frequency GPS Data to Classify Main Behavioural Categories in a Przewalski’s Horse in the Mongolian Gobi |
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2010 |
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DigitalCommons@University of Nebraska – Lincoln |
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Equine Behaviour @ team @ |
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6200 |
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Leiner, L. |
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Title |
Vergleich verschiedener Methoden zur Angstextinktion bei Pferden |
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2006 |
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Pferde sind Fluchttiere. Ihr Fluchtinstinkt bewirkt, dass sie sich leicht erschrecken und auch in
diversen Situationen mit Flucht reagieren. Diese Tatsache ist den meisten Reitern bekannt,
nur ist es für den Menschen teilweise schwer, mit dieser Eigenschaft auszukommen und sie zu
verstehen oder gar nachzuvollziehen. So kommt es häufig zu Unfällen, die aus der Angst der
Pferde resultieren, jedoch vermeidbar gewesen wären, hätte man ankündigende Signale früher
erkannt. Des Weiteren kann die Angst eines Pferdes auch durch eine (Ver-) Weigerung,
bestimmte Dinge zu tun, sichtbar werden. Diese Weigerung wird in der Reiterei gerne als
„Bockigkeit“ und „Ungehorsam“ des Pferdes interpretiert und führt nicht selten zu einer
Bestrafung. Insgesamt kann man sagen, dass angstauslösende Reize und die Reaktionen des
Pferdes darauf oft falsch eingeschätzt oder falsch interpretiert werden und in der Folge auch
falsch damit umgegangen wird. Ein Grund dafür ist sicher das fehlende Wissen über das
Verhalten des Pferdes. Mit der vorliegenden Diplomarbeit soll ein Beitrag geleistet werden,
das Pferd in seinem Angstverhalten besser zu verstehen. Ziel der Arbeit war es, das Verhalten
des Pferdes bei verschiedenen Intensitäten von Angst zu untersuchen. Des Weiteren wurden
Methoden untersucht, mit denen man die Angst von Pferden vor bestimmten Reizen und
Situationen potentiell lindern kann, was letztendlich auch der Unfallvorbeugung dient.
Die vorliegende Diplomarbeit wurde am Haupt- und Landesgestüt Marbach durchgeführt; 24
Junghengste standen hierfür zur Verfügung. Darunter waren 18 Deutsche Warmblüter, 3
Vollblutaraber und 3 Schwarzwälder Füchse (Kaltblüter), somit war auch ein Rassenvergleich
möglich.
In einem ersten Teil der Arbeit wurde untersucht, wie sich Angst bei Pferden äußert. Hierfür
wurde ausgenutzt, dass Pferde ganz generell vor unbekannten, neuen Gegenständen Angst
haben (= Neophobie). Zur Angstauslösung dienten als Konfrontationsgegenstände ein
Sonnenschirm und eine Plastikplane. Beide Gegenstände waren für die Testpferde unbekannt.
Das Verhalten sowie die Herzrate der Tiere wurden während aller Versuche beobachtet und
quantifiziert. Nacheiner ersten Konfrontation wurden die Pferde an die Objekte gewöhnt
(Extinktionstraining = Angstlöschung) und beobachtet welche Verhaltensymptome sich
während dieser Gewöhnung (= Verlust der Neophobie) verändern. Die Hypothese war, dass
tatsächliche Angstsymptome während der Gewöhnung immer seltener zu beobachten sind.
Zusammenfassung III
Als Verhaltensweisen für Angst konnten Ausweichbewegungen und Flucht, Lautäußerungen
(Prusten und Schnauben), das Anspannen der Halsmuskulatur sowie das Vordrücken der
Oberlippe identifiziert werden. Darüber hinaus wurde gezeigt, dass Abstufungen im
Angstverhalten möglich sind: Bei sehr hohem Angstlevel sind Fluchtreaktionen zu
beobachten. Bei mittlerem Angstlevel treten Ausweichbewegungen im Schritt und
Lautäußerungen (Prusten und Schnauben) auf, bei geringem Angstlevel wird die
Halsmuskulatur angespannt und die Oberlippe vorgedrückt.
Im Zweiten Teil der Arbeit sollten verschiedene Methoden zur Angst-Extinktionauf ihre
Wirksamkeit hin untersucht werden. Verwendet wurde in verschiedenen Testgruppen die
Methode der Desensibilisierung (d.h. leichte, schrittweise stärker werdende Exposition
gegenüber dem angstauslösenden Reiz), die Desensibilisierung mit Gegenkonditionierung
(positive Verstärkung) durch Streicheln bzw. Reiben des Halses und die Desensibilisierung
mit Gegenkonditionierung durch Futterbelohnung. Als Kontrollgruppe dienten Pferde, die
ohne eine Konfrontation mit dem angstauslösenden Reiz nur über den Versuchplatz geführt
wurden.
Während des Extinktionstrainings konnte beobachtet werden, dass die Desensibilisierung mit
Gegenkonditionierung zu einer schnelleren Extinktion führt als ohne Gegenkonditionierung.
Allerdings zeigte ein Vergleich mit der Kontrollgruppe, die das Extinktionstraining nicht
erfahren hatte, den gleichen Verlust an Angstverhalten wie die Gruppen mit Extinktionstraining.
Dieses Ergebnis wurde so interpretiert, dass die wiederholte Exposition gegenüber
angstauslösenden Reizen bei den durchgeführten Verhaltenstests zwar eine Rolle spielt, doch
dass auch allein die Beschäftigung mit den Tieren zu einem Verlust von Angstverhalten führt
(wahrscheinlich auch aufgrund eines wachsenden Vertrauens zur Führperson, die über das
komplette Experiment hin die Gleiche blieb). |
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Diploma thesis |
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Equine Behaviour @ team @ |
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6205 |
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Author |
Kruska, D. |
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Title |
Mammalian domestication and its effect on brain structure and behavior |
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1988 |
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Intelligence and Evolutionary Biology |
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Springer-Verlag |
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New York |
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Jerison, H.J.; Jerison, I. |
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Equine Behaviour @ team @ Kruska1988 |
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6232 |
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Author |
Clutton-Brock, J. |
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Title |
Origins of the dog: domestication and early history |
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1995 |
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The Domestic Dog: Its Evolution, Behaviour and Interactions with People |
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Cambridge University Press |
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Cambridge |
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Serpell, J.A. |
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Equine Behaviour @ team @ Clutton-Brock1995 |
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6247 |
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