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Ahrendt, L.P.; Christensen, J.W.; Ladewig, J. |
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Title |
The ability of horses to learn an instrumental task through social observation |
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Abstract |
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Year |
2012 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
139 |
Issue |
1 |
Pages |
105-113 |
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Horse; Social learning; Social interaction; Instrumental task; Investigative behaviour; Aggression |
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The ability of horses to learn through social observation may ease the implementation of new management systems, because the use of automatic feeders etc. by naive horses could be facilitated by observation of experienced horses. However, previous studies found no documentation for observational learning abilities in horses. This study aimed to investigate the ability of horses to learn an instrumental task from a familiar conspecific when social interaction was allowed during the demonstration. Two similar experiments were performed. In the first experiment, Observer horses (n=11) participated in ten successive demonstrations, where a trained Demonstrator opened an operant device by pushing a sliding lid aside with the muzzle in order to obtain a food reward. Immediately after the demonstrations the Observer horses were given the opportunity to operate the device alone. Control horses (n=11) were aware that the device contained food but were presented to the operant device without demonstration of the task. The learning criterion was at least two openings. Accomplishment of and latency to accomplish the learning criterion, and investigative behaviour towards the operant device were recorded. Five Observers and one Control, out of the eleven horses in each treatment group, accomplished the learning criterion. Even though this presents a high odds ratio (OR) in favour of the Observer treatment (OR=7.6), there was no significant difference between the treatment groups (P=0.15). Analysis of investigative behaviour showed, however, that the demonstrations increased the motivation of the Observer horses to investigate the device. Subsequently, a similar experiment was performed in a practical setting with 44 test horses (mixed age, gender and breed). We used the same operant device and the same number and type of demonstrations, although the horses were held on a loose rope to minimise aggression. In this second experiment, six of 23 Observer horses and five of 21 Control horses learned the instrumental task, representing no influence of the demonstration. Thus, this study did not demonstrate an ability of horses to learn an instrumental task through observation. |
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0168-1591 |
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Equine Behaviour @ team @ S0168-1591(12)00087-1 |
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5773 |
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Author |
Christensen, J.W.; Ahrendt, L.P.; Lintrup, R.; Gaillard, C.; Palme, R.; Malmkvist, J. |
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Title |
Does learning performance in horses relate to fearfulness, baseline stress hormone, and social rank? |
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Abstract |
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Year |
2012 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
App Anim Behav Sci |
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140 |
Issue |
1 |
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44-52 |
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Keywords |
Horse; Learning; Fearfulness; Stress; Reinforcement; Social rank |
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The ability of horses to learn and remember new tasks is fundamentally important for their use by humans. Fearfulness may, however, interfere with learning, because stimuli in the environment can overshadow signals from the rider or handler. In addition, prolonged high levels of stress hormones can affect neurons within the hippocampus; a brain region central to learning and memory. In a series of experiments, we aimed to investigate the link between performance in two learning tests, the baseline level of stress hormones, measured as faecal cortisol metabolites (FCM), fearfulness, and social rank. Twenty-five geldings (2 or 3 years old) pastured in one group were included in the study. The learning tests were performed by professional trainers and included a number of predefined stages during which the horses were gradually trained to perform exercises, using either negative (NR) or positive reinforcement (PR). Each of the learning tests lasted 3 days; 7min/horse/day. The NR test was repeated in a novel environment. Performance, measured as final stage in the training programme, and heart rate (HR) were recorded. Faeces were collected on four separate days where the horses had been undisturbed at pasture for 48h. Social rank was determined through observations of social interactions during feeding. The fear test was a novel object test during which behaviour and HR were recorded. Performance in the NR and PR learning tests did not correlate. In the NR test, there was a significant, negative correlation between performance and HR in the novel environment (rS=-0.66, P<0.001, i.e. nervous horses had reduced performance), whereas there was no such correlation in the home environment (both NR and PR). Behavioural reactions in the fear test correlated significantly with performance in the NR test in the novel environment (e.g. object alertness and final stage: rS=-0.43, P=0.04), suggesting that performance under unfamiliar, stressful conditions may be predicted by behavioural responses in a fear test. There was a negative correlation between social rank and baseline stress hormones (rS=-0.43, P=0.04), i.e. high rank corresponded to low FCM concentrations, whereas neither rank nor FCM correlated with fearfulness or learning performance. We conclude that performance under stressful conditions is affected by activation of the sympathetic nervous system during training and related to behavioural responses in a standardised fear test. Learning performance in the home environment, however, appears unrelated to fearfulness, social rank and baseline FCM levels. |
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0168-1591 |
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Equine Behaviour @ team @ S0168-1591(12)00168-2 |
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5769 |
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Sabou, M.; Bontcheva, K.; Scharl, A. |
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Title |
Crowdsourcing Research Opportunities: Lessons from Natural Language Processing |
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2012 |
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Proceedings of the 12th International Conference on Knowledge Management and Knowledge Technologies |
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1-18 |
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crowdsourcing, games with a purpose, natural language processing, resource acquisition |
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Acm |
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New York, NY, USA |
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i-KNOW '12 |
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978-1-4503-1242-4 |
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Equine Behaviour @ team @ Sabou:2012:CRO:2362456.2362479 |
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6436 |
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Smaers, J.B.; Dechmann, D.K.N.; Goswami, A.; Soligo, C.; Safi, K. |
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Comparative analyses of evolutionary rates reveal different pathways to encephalization in bats, carnivorans, and primates |
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2012 |
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Proc Natl Acad Sci U S A |
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109 |
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Equine Behaviour @ team @ Smaers2012 |
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6238 |
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Tennie, C.; Call, J.; Tomasello, M. |
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Untrained chimpanzees (Pan troglodytes schweinfurthii) fail to imitate novel actions |
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2012 |
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PLoS One |
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7 |
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Equine Behaviour @ team @ Tennie2012 |
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6289 |
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Thornton, A.; Samson, J. |
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Innovative problem solving in wild meerkats |
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2012 |
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Anim Behav |
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83 |
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Equine Behaviour @ team @ Thornton2012 |
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6267 |
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Van Horik, J.; Clayton, N.; Emery, N. |
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Convergent evolution of cognition in Corvids, Apes and other animals |
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2012 |
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Oxford Handbook of Comparative Evolutionary Psychology |
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Oxford University Press |
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New York |
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Vonk, J.; Shackelford, T. |
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Equine Behaviour @ team @ Van Horik2012 |
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6284 |
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Van Schaik, C.P.; Isler, K.; Burkart, J.M. |
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Title |
Explaining brain size variation: from social to cultural brain |
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2012 |
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Trends Ecol Evol |
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16 |
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Equine Behaviour @ team @ Van Schaik2012 |
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6304 |
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Zaccaroni, M.; Passilongo, D.; Buccianti, A.; Dessi-Fulgheri, F.; Facchini, C.; Gazzola, A. |
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Group specific vocal signature in free- ranging wolf packs |
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2012 |
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Ethol Ecol Evol |
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Equine Behaviour @ team @ Zaccaroni2012 |
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6470 |
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