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Author |
Vallortigara G.; Regolin L.; Pagni P. |
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Title |
Detour behaviour, imprinting and visual lateralization in the domestic chick |
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Journal Article |
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1999 |
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Cognitive Brain Research |
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7 |
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307-320 |
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3461 |
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Author |
Gácsi, M.; McGreevy, P.; Kara, E.; Miklósi, Á. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Effects of selection for cooperation and attention in dogs |
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Journal Article |
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Year |
2009 |
Publication |
Behavioral and Brain Functions |
Abbreviated Journal |
Behav Brain Funct |
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5 |
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31 |
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ABSTRACT: BACKGROUND: It has been suggested that the functional similarities in the socio-cognitive behaviour of dogs and humans emerged as a consequence of comparable environmental selection pressures. Here we use a novel approach to account for the facilitating effect of domestication in dogs and reveal that selection for two factors under genetic influence (visual cooperation and focused attention) may have led independently to increased comprehension of human communicational cues. METHOD: In Study 1, we observed the performance of three groups of dogs in utilizing the human pointing gesture in a two-way object choice test. We compared breeds selected to work while visually separated from human partners (N = 30, 21 breeds, clustered as independent worker group), with those selected to work in close cooperation and continuous visual contact with human partners (N = 30, 22 breeds, clustered as cooperative worker group), and with a group of mongrels (N = 30).Secondly, it has been reported that, in dogs, selective breeding to produce an abnormal shortening of the skull is associated with a more pronounced area centralis (location of greatest visual acuity). In Study 2, breeds with high cephalic index and more frontally placed eyes (brachycephalic breeds, N = 25, 14 breeds) were compared with breeds with low cephalic index and laterally placed eyes (dolichocephalic breeds, N = 25, 14 breeds). RESULTS: In Study 1, cooperative workers were significantly more successful in utilizing the human pointing gesture than both the independent workers and the mongrels.In study 2, we found that brachycephalic dogs performed significantly better than dolichocephalic breeds. DISCUSSION: After controlling for environmental factors, we have provided evidence that at least two independent phenotypic traits with certain genetic variability affect the ability of dogs to rely on human visual cues. This finding should caution researchers against making simple generalizations about the effects of domestication and on dog-wolf differences in the utilization of human visual signals. |
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Dept, of Ethology, Eotvos University, H-1117, Budapest, Pazmany P, s, 1/c,, Hungary. gm.art@t-online.hu |
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1744-9081 |
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PMID:19630939 |
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Equine Behaviour @ team @ |
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4968 |
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Macphail, E.M. |
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Title |
Cognitive function in mammals: the evolutionary perspective |
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Journal Article |
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1996 |
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Brain research. Cognitive brain research |
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Brain Res Cogn Brain Res |
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3 |
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3-4 |
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279-290 |
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Animals; Cognition/*physiology; Conditioning (Psychology)/*physiology; Evolution; Humans; Learning/*physiology; Task Performance and Analysis |
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The work of behavioural pharmacologists has concentrated on small animals, such as rodents and pigeons. The validity of extrapolation of their findings to humans depends upon the existence of parallels in both physiology and psychology between these animals and humans. This paper considers the question whether there are in fact substantial cognitive parallels between, first, different non-human groups of vertebrates and, second, non-humans and humans. Behavioural data from 'simple' tasks, such as habituation and conditioning, do not point to species differences among vertebrates. Using examples that concentrate on the performance of rodents and birds, it is argued that, similarly, data from more complex tasks (learning-set formation, transitive inference, and spatial memory serve as examples) reveal few if any cognitive differences amongst non-human vertebrates. This conclusion supports the notion that association formation may be the critical problem-solving process available to non-human animals; associative mechanisms are assumed to have evolved to detect causal links between events, and would therefore be relevant in all ecological niches. In agreement with this view, recent advances in comparative neurology show striking parallels in functional organisation of mammalian and avian telencephalon. Finally, it is argued that although the peculiarly human capacity for language marks a large cognitive contrast between humans and non-humans, there is good evidence-in particular, from work on implicit learning--that the learning mechanisms available to non--humans are present and do play an important role in human cognition. |
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Department of Psychology, University of York at Heslington, UK |
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0926-6410 |
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PMID:8806029 |
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refbase @ user @ |
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603 |
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Zachritz W.H.; Lundie L.L.; Wang H.; Thomas R.K. |
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Investigating cognitive abilities in animals: unrealized potential |
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1996 |
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Cognitive Brain Research |
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3 |
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157-166 |
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refbase @ user @ |
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3449 |
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Author |
Bizot J.-C.; Thiebot M.-H. |
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Title |
Impulsivity as a confounding factor in certain animal tests of cognitive function |
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1996 |
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Cognitive Brain Research |
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3 |
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243-250 |
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refbase @ user @ |
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3450 |
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Author |
Davidsson T.E.; Leonardson L.G.; Marston H.M. |
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Title |
Analysis of cognitive function in animals, the value of SDT |
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1996 |
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Cognitive Brain Research |
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3 |
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269-277 |
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refbase @ user @ |
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3451 |
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Author |
Premack D; Woodruff G |
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Does the chimpanzee have a theory of mind? |
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1978 |
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Behav. Brain Sci. |
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1 |
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515 |
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Equine Behaviour @ team @ |
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3035 |
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Author |
Krishnan, A.; Gandour, J.T.; Ananthakrishnan, S.; Bidelman, G.M.; Smalt, C.J. |
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Title |
Functional ear (a)symmetry in brainstem neural activity relevant to encoding of voice pitch: A precursor for hemispheric specialization? |
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Brain and Language |
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In Press, Corrected Proof |
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Auditory; Human; Brainstem; Pitch; Language; Mandarin Chinese; Fundamental frequency-following response (FFR); Functional ear asymmetry; Experience-dependent plasticity; Subcortical |
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Pitch processing is lateralized to the right hemisphere; linguistic pitch is further mediated by left cortical areas. This experiment investigates whether ear asymmetries vary in brainstem representation of pitch depending on linguistic status. Brainstem frequency-following responses (FFRs) were elicited by monaural stimulation of the left and right ear of 15 native speakers of Mandarin Chinese using two synthetic speech stimuli that differ in linguistic status of tone. One represented a native lexical tone (Tone 2: T2); the other, T2', a nonnative variant in which the pitch contour was a mirror image of T2 with the same starting and ending frequencies. Two 40-ms portions of f0 contours were selected in order to compare two regions (R1, early; R2 late) differing in pitch acceleration rate and perceptual saliency. In R2, linguistic status effects revealed that T2 exhibited a larger degree of FFR rightward ear asymmetry as reflected in f0 amplitude relative to T2'. Relative to midline (ear asymmetry = 0), the only ear asymmetry reaching significance was that favoring left ear stimulation elicited by T2'. By left- and right-ear stimulation separately, FFRs elicited by T2 were larger than T2' in the right ear only. Within T2', FFRs elicited by the earlier region were larger than the later in both ears. Within T2, no significant differences in FFRS were observed between regions in either ear. Collectively, these findings support the idea that origins of cortical processing preferences for perceptually-salient portions of pitch are rooted in early, preattentive stages of processing in the brainstem. |
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0093-934x |
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Equine Behaviour @ team @ |
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5391 |
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Author |
Allman, J.M. |
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Title |
Evolving brains. |
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2000 |
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Evolving brains |
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How did the human brain with all its manifold capacities evolve from basic functions in simple organisms that lived nearly a billion years ago? John Allman addresses this question in Evolving Brains, a provocative study of brain evolution that introduces readers to some of the most exciting developments in science in recent years. |
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Scientific American Library |
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New York |
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978-0716760382 |
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Equine Behaviour @ team @ |
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5460 |
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Author |
Tang, Akaysha C. |
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Title |
A hippocampal theory of cerebral lateralization. |
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2003 |
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The asymmetrical brain |
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37-68 |
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MIT Press |
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Massechusetts |
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Hugdahl K. and Davidson R.J. |
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0-262-58254-6 |
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Equine Behaviour @ team @ |
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5753 |
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