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Author |
Santos LR; Hauser MD; Spelke ES |
Title |
Recognition and categorization of biologically significant objects by rhesus monkeys (Macaca mulatta): the domain of food |
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Journal Article |
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2001 |
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Cognition |
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82 |
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127 |
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Equine Behaviour @ team @ |
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3073 |
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Author |
Hauser MD |
Title |
Artifactual kinds and functional design features: what a primate understands without language |
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Journal Article |
Year |
1997 |
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Cognition |
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64 |
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285 |
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Equine Behaviour @ team @ |
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3064 |
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Author |
Sato, W.; Aoki, S. |
Title |
Right hemispheric dominance in processing of unconscious negative emotion |
Type |
Journal Article |
Year |
2006 |
Publication |
Brain and Cognition |
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Volume |
62 |
Issue |
3 |
Pages |
261-266 |
Keywords |
Right hemispheric dominance; Unconscious negative emotion; Subliminal affective priming; Emotional facial expressions |
Abstract |
Right hemispheric dominance in unconscious emotional processing has been suggested, but remains controversial. This issue was investigated using the subliminal affective priming paradigm combined with unilateral visual presentation in 40 normal subjects. In either left or right visual fields, angry facial expressions, happy facial expressions, or plain gray images were briefly presented as negative, positive, and control primes, followed by a mosaic mask. Then nonsense target ideographs were presented, and the subjects evaluated their partiality toward the targets. When the stimuli were presented in the left, but not the right, visual fields, the negative primes reduced the subjects' liking for the targets, relative to the case of the positive or control primes. These results provided behavioral evidence supporting the hypothesis that the right hemisphere is dominant for unconscious negative emotional processing. |
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Equine Behaviour @ team @ |
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4638 |
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Author |
Premack D; Premack AJ |
Title |
Levels of causal understanding in chimpanzees and children |
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Journal Article |
Year |
1994 |
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Cognition |
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50 |
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347 |
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Equine Behaviour @ team @ |
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3072 |
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Harris, L.J.; Almerigi, J.B.; Carbary, T.J.; Fogel, T.G. |
Title |
Left-side infant holding: A test of the hemispheric arousal -attentional hypothesis |
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Journal Article |
Year |
2001 |
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Brain and Cognition |
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46 |
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1-2 |
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159-165 |
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When asked to hold a young infant in their arms, most adults hold on the left side (Harris, 1997). In a prior study, we found the same bias when we asked adults merely to imagine holding an infant in their arms (Harris, Almerigi, & Kirsch, 1999). It has been hypothesized that the left-side bias is the product of right-hemisphere arousal accompanying certain aspects of the act, causing attention to be driven to the contralateral, or left, side of personal space. Left-side holding, whether actual or imagined, thus would be consistent with the direction to which the holder's attention has been endogenously directed. We tested this hypothesis by giving 250 college students the “imagine-holding” task and then, as an independent measure of lateralized hemispheric arousal, a 34-item Chimeric Faces Test (CFT). On the “imagine” test, a significant majority reported a left-side hold, and, on the CFT, left-side holders had a significantly stronger left-hemispace bias than right-side holders, although both left- and right- side holders had left-hemispace CFT biases. The results thus support the attentional-arousal hypothesis but indicate that other factors are contributing as well. |
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0278-2626 |
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Equine Behaviour @ team @ |
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5344 |
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Author |
Wittling, W.; Block, A.; Schweiger, E.; Genzel, S. |
Title |
Hemisphere Asymmetry in Sympathetic Control of the Human Myocardium |
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Journal Article |
Year |
1998 |
Publication |
Brain and Cognition |
Abbreviated Journal |
Brain Cogn. |
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38 |
Issue |
1 |
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17-35 |
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Hemisphere asymmetry in sympathetic control of myocardial performance was studied in healthy human subjects using lateralized film presentation for selective sensory stimulation of the hemispheres and impedance cardiography for the evaluation of cardiac output, systolic time intervals and myocardial contractility. Results revealed a clear and consistent right hemisphere predominance in sympathetically mediated control of various components of myocardial performance. There is reason to assume that the obtained hemisphere differences in autonomic control of the heart are self-reliant processes not depending on emotion-related hemisphere asymmetry. As far as we know, this is the first study examining the distinct roles of the cerebral hemispheres in neural control of ventricular myocardial functions. |
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0278-2626 |
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Equine Behaviour @ team @ |
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5351 |
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Author |
Cheney, D.L.; Seyfarth, R.M. |
Title |
The representation of social relations by monkeys |
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Journal Article |
Year |
1990 |
Publication |
Cognition |
Abbreviated Journal |
Cognition |
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37 |
Issue |
1-2 |
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167-196 |
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Animals; Cercopithecus aethiops/*psychology; Concept Formation; *Dominance-Subordination; Female; Macaca fascicularis/*psychology; Male; *Social Behavior; *Social Environment |
Abstract |
Monkeys recognize the social relations that exist among others in their group. They know who associates with whom, for example, and other animals' relative dominance ranks. In addition, monkeys appear to compare types of social relations and make same/different judgments about them. In captivity, longtailed macaques (Macaca fascicularis) trained to recognize the relation between one adult female and her offspring can identify the same relation among other mother-offspring pairs, and distinguish this relation from bonds between individuals who are related in a different way. In the wild, if a vervet monkey (Cercopithecus aethiops) has seen a fight between a member of its own family and a member of Family X, this increases the likelihood that it will act aggressively toward another member of Family X. Vervets act as if they recognize some similarity between their own close associates and the close associates of others. To make such comparisons the monkeys must have some way of representing the properties of social relationships. We discuss the adaptive value of such representations, the information they contain, their structure, and their limitations. |
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Department of Anthropology, University of Pennsylvania, Philadelphia 19104 |
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English |
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0010-0277 |
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PMID:2269006 |
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refbase @ user @ |
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702 |
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Author |
Bernauer, K.; Kollross, H.; Schuetz, A.; Farmer, K.; Krueger, K. |
Title |
How do horses (Equus caballus) learn from observing human action? |
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Journal Article |
Year |
2020 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
23 |
Issue |
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1-9 |
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Abstract |
A previous study demonstrated that horses can learn socially from observing humans, but could not draw any conclusions about the social learning mechanisms. Here we develop this by showing horses four different human action sequences as demonstrations of how to press a button to open a feed box. We tested 68 horses aged between 3 and 12 years. 63 horses passed the habituation phase and were assigned either to the group Hand Demo (N = 13) for which a kneeling person used a hand to press the button, Head Demo (N = 13) for which a kneeling person used the head, Mixed Demo (N = 12) for which a squatting person used both head and hand, Foot Demo (N = 12) in which a standing person used a foot, or No Demo (N = 13) in which horses did not receive a demonstration. 44 horses reached the learning criterion of opening the feeder twenty times consecutively, 40 of these were 75% of the Demo group horses and four horses were 31% of the No Demo group horses. Horses not reaching the learning criterion approached the human experimenters more often than those who did. Significantly more horses used their head to press the button no matter which demonstration they received. However, in the Foot Demo group four horses consistently preferred to use a hoof and two switched between hoof and head use. After the Mixed Demo the horses' actions were more diverse. The results indicate that only a few horses copy behaviours when learning socially from humans. A few may learn through observational conditioning, as some appeared to adapt to demonstrated actions in the course of reaching the learning criterion. Most horses learn socially through enhancement, using humans to learn where, and which aspect of a mechanism has to be manipulated, and by applying individual trial and error learning to reach their goal. |
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1435-9456 |
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Equine Behaviour @ team @ Bernauer2019 |
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6590 |
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Trösch, M.; Pellon, S.; Cuzol, F.; Parias, C.; Nowak, R.; Calandreau, L.; Lansade, L. |
Title |
Horses feel emotions when they watch positive and negative horse-human interactions in a video and transpose what they saw to real life |
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Journal Article |
Year |
2020 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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23 |
Issue |
4 |
Pages |
643-653 |
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Animals can indirectly gather meaningful information about other individuals by eavesdropping on their third-party interactions. In particular, eavesdropping can be used to indirectly attribute a negative or positive valence to an individual and to adjust one's future behavior towards that individual. Few studies have focused on this ability in nonhuman animals, especially in nonprimate species. Here, we investigated this ability for the first time in domestic horses (Equus caballus) by projecting videos of positive and negative interactions between an unknown human experimenter (a “positive” experimenter or a “negative” experimenter) and an actor horse. The horses reacted emotionally while watching the videos, expressing behavioral (facial expressions and contact-seeking behavior) and physiological (heart rate) cues of positive emotions while watching the positive video and of negative emotions while watching the negative video. This result shows that the horses perceived the content of the videos and suggests an emotional contagion between the actor horse and the subjects. After the videos were projected, the horses took a choice test, facing the positive and negative experimenters in real life. The horses successfully used the interactions seen in the videos to discriminate between the experimenters. They touched the negative experimenter significantly more, which seems counterintuitive but can be interpreted as an appeasement attempt, based on the existing literature. This result suggests that horses can indirectly attribute a valence to a human experimenter by eavesdropping on a previous third-party interaction with a conspecific. |
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Equine Behaviour @ team @ Trösch2020 |
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6649 |
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Author |
Baron-Cohen S; Leslie AM; Frith U |
Title |
Does the autistic child have a “theory of mind”? |
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Journal Article |
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1985 |
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Cognition |
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21 |
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37 |
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Equine Behaviour @ team @ |
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2979 |
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