| Records |
| Author |
Imura, T.; Tomonaga, M. |
| Title |
Perception of depth from shading in infant chimpanzees ( Pan troglodytes) |
Type |
Journal Article |
| Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
6 |
Issue |
4 |
Pages  |
253-258 |
| Keywords |
Age Factors; Animals; Contrast Sensitivity/*physiology; Depth Perception/*physiology; Discrimination Learning/*physiology; Female; Male; Pan troglodytes/growth & development/*physiology/*psychology; Pattern Recognition, Visual/physiology |
| Abstract |
We investigated the ability to perceive depth from shading, one of the pictorial depth cues, in three chimpanzee infants aged 4-10 months old, using a preferential reaching task commonly used to study pictorial depth perception in human infants. The chimpanzee infants reached significantly more to three-dimensional toys than to pictures thereof and more to the three-dimensional convex than to the concave. Furthermore, two of the three infants reached significantly more to the photographic convex than to the photographic concave. These infants also looked longer at the photographic convex than the concave. Our results suggest that chimpanzees perceive, at least as early as the latter half of the first year of life, pictorial depth defined by shading information. Photographic convexes contain richer information about pictorial depth (e.g., attached shadow, cast shadow, highlighted area, and global difference in brightness) than simple computer-graphic graded patterns. These cues together might facilitate the infants' perception of depth from shading. |
| Address |
Graduate School of Humanities, Kwansei Gakuin University, Uegahara, Nishinomiya, Hyogo 662-8501, Japan |
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1435-9448 |
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PMID:14610661 |
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no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2550 |
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| Author |
Watve, M.; Thakar, J.; Kale, A.; Puntambekar, S.; Shaikh, I.; Vaze, K.; Jog, M.; Paranjape, S. |
| Title |
Bee-eaters ( Merops orientalis) respond to what a predator can see |
Type |
Journal Article |
| Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
5 |
Issue |
4 |
Pages |
253-259 |
| Keywords |
Animals; Birds/*physiology; *Predatory Behavior; *Visual Perception |
| Abstract |
Two sets of experiments are reported that show that the small green bee-eater ( Merops orientalis, a small tropical bird) can appreciate what a predator can or cannot see. Bee-eaters avoid entering the nest in the presence of a potential nest predator. In the first set of experiments bee-eaters entered the nest more frequently when the predator was unable to see the nest from its position, as compared to an approximately equidistant position from which the nest could be seen. In the second set of experiments bee-eaters entered the nest more frequently when the predator was looking away from the nest. The angle of gaze from the nest was associated significantly positively with the probability of entering the nest whereas the angle from the bird was not. Birds showed considerable flexibility as well as individual variation in the possible methods of judging the predator's position and direction of gaze. |
| Address |
Life Research Foundation, 10, Pranav, 1000/6C Navi Peth, Pune 411030, India. watve@vsnl.com |
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1435-9448 |
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| Notes |
PMID:12461603 |
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no |
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Equine Behaviour @ team @ |
Serial |
2587 |
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| Author |
Lea, S.E.G.; Goto, K.; Osthaus, B.; Ryan, C.M.E. |
| Title |
The logic of the stimulus |
Type |
Journal Article |
| Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
9 |
Issue |
4 |
Pages |
247-256 |
| Keywords |
Animals; Behavior, Animal/*physiology; Cognition/*physiology; Columbidae; Comprehension/physiology; Dogs; Humans; *Logic; Pattern Recognition, Visual/physiology; Perception/*physiology; Problem Solving/*physiology; Species Specificity |
| Abstract |
This paper examines the contribution of stimulus processing to animal logics. In the classic functionalist S-O-R view of learning (and cognition), stimuli provide the raw material to which the organism applies its cognitive processes-its logic, which may be taxon-specific. Stimuli may contribute to the logic of the organism's response, and may do so in taxon-specific ways. Firstly, any non-trivial stimulus has an internal organization that may constrain or bias the way that the organism addresses it; since stimuli can only be defined relative to the organism's perceptual apparatus, and this apparatus is taxon-specific, such constraints or biases will often be taxon-specific. Secondly, the representation of a stimulus that the perceptual system builds, and the analysis it makes of this representation, may provide a model for the synthesis and analysis done at a more cognitive level. Such a model is plausible for evolutionary reasons: perceptual analysis was probably perfected before cognitive analysis in the evolutionary history of the vertebrates. Like stimulus-driven analysis, such perceptually modelled cognition may be taxon-specific because of the taxon-specificity of the perceptual apparatus. However, it may also be the case that different taxa are able to free themselves from the stimulus logic, and therefore apply a more abstract logic, to different extents. This thesis is defended with reference to two examples of cases where animals' cognitive logic seems to be isomorphic with perceptual logic, specifically in the case of pigeons' attention to global and local information in visual stimuli, and dogs' failure to comprehend means-end relationships in string-pulling tasks. |
| Address |
School of Psychology, Washington Singer Laboratories, University of Exeter, Exeter, EX4 4QG, United Kingdom. s.e.g.lea@exeter.ac.uk |
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1435-9448 |
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| Notes |
PMID:16909234 |
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no |
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Equine Behaviour @ team @ |
Serial |
2450 |
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| Author |
Hart, D.; Whitlow, J.W.J. |
| Title |
The experience of self in the bottlenose dolphin |
Type |
Journal Article |
| Year |
1995 |
Publication |
Consciousness and Cognition |
Abbreviated Journal |
Conscious Cogn |
| Volume |
4 |
Issue |
2 |
Pages |
244-247 |
| Keywords |
Animal Communication; Animals; *Awareness; Body Image; Dolphins/*psychology; Female; Humans; Male; *Self Concept; Social Behavior; Species Specificity; *Television; *Visual Perception |
| Abstract |
Marten and Psarakos have presented some evidence which suggests that objective self-awareness and possibly representations of self may characterize the dolphins' experience of self. Their research demonstrates the possibility of similarities in the sense of self between primate species and dolphins, although whether dolphins have subjective self-awareness, personal memories, and theories of self--all important facets of the sense of self in humans--was not examined. Clearly, even this limited evidence was difficult to achieve; the difficulties in adapting methods and coding behavior are quite apparent in their report. Future progress, however, may depend upon clarification of what are the necessary components for a sense of self and an explication of how these might be reflected in dolphin behavior. We are mindful of the authors' point (pp. 219 and 220) that the dolphin lives more in an acoustic than a visual environment. Thus, while tasks relying upon vision may reveal the presence or absence of the sense of self in primates, it might well be the case that in dolphins self-related experiences might be better revealed in auditory tasks. But then, what is the nature of human self-awareness in terms of audition? While both conceptual and methodological hurdles remain, Marten and Psarakos have demonstrated that important questions can be asked about the minds and phenomenal worlds of nonanthropoid species. |
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Department of Psychology, Rutgers University, Camden, New Jersey 08102, USA |
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1053-8100 |
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| Notes |
PMID:8521264 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4162 |
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| Author |
Wilson, D.A.; Stevenson, R.J. |
| Title |
The fundamental role of memory in olfactory perception |
Type |
Journal Article |
| Year |
2003 |
Publication |
Trends in Neurosciences |
Abbreviated Journal |
Trends. Neurosci. |
| Volume |
26 |
Issue |
5 |
Pages |
243-247 |
| Keywords |
olfactory perception mammals |
| Abstract |
Current emphasis on odorant physiochemical features as the basis for perception largely ignores the synthetic and experience-dependent nature of olfaction. Olfaction is synthetic, as mammals have only limited ability to identify elements within even simple odor mixtures. Furthermore, olfaction is experience-bound, as exposure alone can significantly affect the extent to which stimuli can be discriminated. We propose that early analytical processing of odors is inaccessible at the behavioral level and that all odors are initially encoded as `objects' in the piriform cortex. Moreover, we suggest that odor perception is wholly dependent on the integrity of this memory system and that its loss severely impairs normal perception. |
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refbase @ user @ |
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795 |
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| Author |
Anderson, J.R. |
| Title |
Self-recognition in dolphins: credible cetaceans; compromised criteria, controls, and conclusions |
Type |
Journal Article |
| Year |
1995 |
Publication |
Consciousness and Cognition |
Abbreviated Journal |
Conscious Cogn |
| Volume |
4 |
Issue |
2 |
Pages |
239-243 |
| Keywords |
Animal Communication; Animals; *Awareness; Discrimination Learning; Dolphins/*psychology; Female; Male; Orientation; *Self Concept; Social Behavior; *Television; *Visual Perception |
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| Address |
Laboratoire de Psychophysiologie, CNRS URA 1295, Universite Louis Pasteur, Strasbourg, France |
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1053-8100 |
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| Notes |
PMID:8521263 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
4163 |
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| Author |
Rogers, L.J. |
| Title |
Evolution of hemispheric specialization: advantages and disadvantages |
Type |
Journal Article |
| Year |
2000 |
Publication |
Brain and Language |
Abbreviated Journal |
Brain Lang |
| Volume |
73 |
Issue |
2 |
Pages |
236-253 |
| Keywords |
Aggression/psychology; Animals; Behavior, Animal/physiology; Brain/*physiology; Chickens/physiology; *Evolution; Feeding Behavior/physiology; Functional Laterality/*physiology; Visual Fields/physiology; Visual Perception/physiology |
| Abstract |
Lateralization of the brain appeared early in evolution and many of its features appear to have been retained, possibly even in humans. We now have a considerable amount of information on the different forms of lateralization in a number of species, and the commonalities of these are discussed, but there has been relatively little investigation of the advantages of being lateralized. This article reports new findings on the differences between lateralized and nonlateralized chicks. The lateralized chicks were exposed to light for 24 h on day 19 of incubation, a treatment known to lead to lateralization of a number of visually guided responses, and the nonlateralized chicks were incubated in the dark. When they were feeding, the lateralized chicks were found to detect a stimulus resembling a raptor with shorter latency than nonlateralized chicks. This difference was not a nonspecific effect caused by the light-exposed chicks being more distressed by the stimulus. Instead, it appears to be a genuine advantage conferred by having a lateralized brain. It is suggested that having a lateralized brain allows dual attention to the tasks of feeding (right eye and left hemisphere) and vigilance for predators (left eye and right hemisphere). Nonlateralized chicks appear to perform these dual tasks less efficiently than lateralized ones. Reference is made to other species in discussing these results. |
| Address |
Division of Zoology, University of New England, Armidale, New South Wales, Australia. lrogers@metz.une.edu.au |
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0093-934X |
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| Notes |
PMID:10856176 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
4621 |
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| Author |
Fremouw, T.; Herbranson, W.T.; Shimp, C.P. |
| Title |
Dynamic shifts of pigeon local/global attention |
Type |
Journal Article |
| Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
5 |
Issue |
4 |
Pages |
233-243 |
| Keywords |
Animals; Attention/*physiology; *Behavior, Animal; Columbidae/*physiology; Male; Reaction Time; Visual Perception/*physiology |
| Abstract |
It has previously been shown that pigeons can shift attention between parts and wholes of complex stimuli composed of larger, “global” characters constructed from smaller, “local” characters. The base-rate procedure used biased target level within any condition at either the local or global level; targets were more likely at one level than at the other. Biasing of target level in this manner demonstrated shifts of local/global attention over a time span consisting of several days with a fixed base rate. Experiment 1 examined the possibility that pigeons can shift attention between local and global levels of perceptual analysis in seconds rather than days. The experiment used priming cues the color of which predicted on a trial-by-trial basis targets at different perceptual levels. The results confirmed that pigeons, like humans, can display highly dynamic stimulus-driven shifts of local/global attention. Experiment 2 changed spatial relations between features of priming cues and features of targets within a task otherwise similar to that used in experiment 1. It was predicted that this change in cues might affect asymmetry but not the occurrence of a priming effect. A priming effect was again obtained, thereby providing generality to the claim that pigeons can learn that trial-by-trial primes predict targets at different levels of perceptual analysis. Pigeons can display perceptual, stimulus-driven priming of a highly dynamic nature. |
| Address |
Department of Psychology, University of California-Berkeley, Berkeley, CA 94720-1650, USA |
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1435-9448 |
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PMID:12461601 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
2589 |
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| Author |
Brennan, P.A. |
| Title |
The nose knows who's who: chemosensory individuality and mate recognition in mice |
Type |
Journal Article |
| Year |
2004 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
Horm Behav |
| Volume |
46 |
Issue |
3 |
Pages |
231-240 |
| Keywords |
Animals; Chemoreceptors/physiology; Discrimination Learning/*physiology; Embryo Implantation/physiology; Female; Individuality; Major Histocompatibility Complex/physiology; Male; Mice; Neurons, Afferent/physiology; Nose/cytology/physiology; Perception/physiology; Pregnancy; Pregnancy Maintenance/physiology; Pregnancy, Animal/*physiology; Receptors, Odorant/*physiology; Recognition (Psychology)/*physiology; Sexual Behavior, Animal/*physiology; Smell/*physiology; Urine/physiology; Vomeronasal Organ/cytology/physiology |
| Abstract |
Individual recognition is an important component of behaviors, such as mate choice and maternal bonding that are vital for reproductive success. This article highlights recent developments in our understanding of the chemosensory cues and the neural pathways involved in individuality discrimination in rodents. There appear to be several types of chemosensory signal of individuality that are influenced by the highly polymorphic families of major histocompatibility complex (MHC) proteins or major urinary proteins (MUPs). Both have the capability of binding small molecules and may influence the individual profile of these chemosignals in biological fluids such as urine, skin secretions, or saliva. Moreover, these proteins, or peptides associated with them, can be taken up into the vomeronasal organ (VNO) where they can potentially interact directly with the vomeronasal receptors. This is particularly interesting given the expression of major histocompatibility complex Ib proteins by the V2R class of vomeronasal receptor and the highly selective responses of accessory olfactory bulb (AOB) mitral cells to strain identity. These findings are consistent with the role of the vomeronasal system in mediating individual discrimination that allows mate recognition in the context of the pregnancy block effect. This is hypothesized to involve a selective increase in the inhibitory control of mitral cells in the accessory olfactory bulb at the first level of processing of the vomeronasal stimulus. |
| Address |
Sub-Department of Animal Behaviour, University of Cambridge, Madingley, Cambridge CB3 8AA, UK. pab23@cus.cam.ac.uk |
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0018-506X |
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PMID:15325224 |
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no |
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Equine Behaviour @ team @ |
Serial |
4191 |
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Shettleworth, S.J.; Westwood, R.P. |
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Divided attention, memory, and spatial discrimination in food-storing and nonstoring birds, black-capped chickadees (Poecile atricapilla) and dark-eyed juncos (Junco hyemalis) |
Type |
Journal Article |
| Year |
2002 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
| Volume |
28 |
Issue |
3 |
Pages |
227-241 |
| Keywords |
Animals; Attention/*physiology; Behavior, Animal/physiology; Birds; *Discrimination (Psychology); *Food Habits; Memory/*physiology; Space Perception/*physiology; Spatial Behavior/*physiology |
| Abstract |
Food-storing birds, black-capped chickadees (Poecile atricapilla), and nonstoring birds, dark-eyed juncos (Junco hyemalis), matched color or location on a touch screen. Both species showed a divided attention effect for color but not for location (Experiment 1). Chickadees performed better on location than on color with retention intervals up to 40 s, but juncos did not (Experiment 2). Increasing sample-distractor distance improved performance similarly in both species. Multidimensional scaling revealed that both use a Euclidean metric of spatial similarity (Experiment 3). When choosing between the location and color of a remembered item, food storers choose location more than do nonstorers. These results explain this effect by differences in memory for location relative to color, not division of attention or spatial discrimination ability. |
| Address |
Department of Psychology, University of Toronto, 100 Saint George Street, Toronto, Ontario M5S 3G3, Canada. shettle@psych.utoronto.ca |
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0097-7403 |
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PMID:12136700 |
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no |
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refbase @ user @ |
Serial |
370 |
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