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Author Tomonaga, M.; Matsuzawa, T. doi  openurl
  Title Sequential responding to arabic numerals with wild cards by the chimpanzee (Pan troglodytes) Type Journal Article
  Year 2000 Publication Animal Cognition Abbreviated Journal Anim. Cogn.  
  Volume (up) 3 Issue 1 Pages 1-11  
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  Abstract One adult female chimpanzee (Pan troglodytes) was trained to respond serially to three arabic numerals between 1 and 9, presented on a cathode-ray-tube (CRT) screen. To examine the factors affecting her sequential responding behavior, wild-card items were added to the three-item sequences. When this wild-card item remained until the subject responded to the last numeral (i.e., the terminator condition), her response to the terminator at each point of the sequence was controlled by the ordinal distance between numerals. Thus, the number of responses to the terminator increased as the ordinal distance between numerals increased. When the wild-card item was eliminated by the subject's response (wild-card conditions), the probability of responses to the wild card before the first numeral increased as a function of the serial position of the first numeral. These results were consistent with previous studies of response time and suggest both serial position and symbolic distance effects. It is suggested that the subject might form the integrated 9-item linear representations by training of possible subsets of three-item sequences. Knowledge concerning the ordinal position of each numeral was established through this training.  
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  Call Number Equine Behaviour @ team @ Serial 3373  
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Author McKinley, J.; Sambrook, T.D. doi  openurl
  Title Use of human-given cues by domestic dogs (Canis familiaris) and horses (Equus caballus) Type Journal Article
  Year 2000 Publication Animal Cognition Abbreviated Journal Anim. Cogn.  
  Volume (up) 3 Issue 1 Pages 13-22  
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  Abstract Sixteen domestic dogs (Canis familiaris) and four horses (Equus caballus) were tested for their ability to use human-given manual and facial cues in an object-choice task. Two of the four horses used touch as a cue and one horse successfully used pointing. The performance of the dogs was considerably better, with 12 subjects able to use pointing as a cue, 4 able to use head orientation and 2 able to use eye gaze alone. Group analysis showed that the dogs performed significantly better in all experimental conditions than during control trials. Dogs were able to use pointing cues even when the cuer's body was closer to the incorrect object. Working gundogs with specialised training used pointing more successfully than pet dogs and gundog breeds performed better than non-gundog breeds. The results of this experiment suggest that animals' use of human given communicative signals depends on cognitive ability, the evolutionary consequences of domestication and enculturation by humans within the individual's lifetime.  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 3555  
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Author Byrne R.W. doi  openurl
  Title - Animal Cognition in Nature, edited by Russell P. Balda, Irene M. Pepperberg and Alan C. Kamil Type Journal Article
  Year 2000 Publication Trends in Cognitive Sciences Abbreviated Journal Trends. Cognit. Sci.  
  Volume (up) 4 Issue Pages 73-73  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 3480  
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Author Clement, T.S.; Feltus, J.R.; Kaiser, D.H.; Zentall, T.R. openurl 
  Title “Work ethic” in pigeons: reward value is directly related to the effort or time required to obtain the reward Type Journal Article
  Year 2000 Publication Psychonomic bulletin & review Abbreviated Journal Psychon Bull Rev  
  Volume (up) 7 Issue 1 Pages 100-106  
  Keywords Animals; Behavior, Animal/*physiology; Cognition/physiology; Columbidae; Discrimination Learning/physiology; Female; Male; Reinforcement (Psychology); *Reward; Time Factors  
  Abstract Stimuli associated with less effort or with shorter delays to reinforcement are generally preferred over those associated with greater effort or longer delays to reinforcement. However, the opposite appears to be true of stimuli that follow greater effort or longer delays. In training, a simple simultaneous discrimination followed a single peck to an initial stimulus (S+FR1 S-FR1) and a different simple simultaneous discrimination followed 20 pecks to the initial stimulus (S+FR20 S-FR20). On test trials, pigeons preferred S+FR20 over S+FR1 and S-FR20 over S-FR1. These data support the view that the state of the animal immediately prior to presentation of the discrimination affects the value of the reinforcement that follows it. This contrast effect is analogous to effects that when they occur in humans have been attributed to more complex cognitive and social factors.  
  Address University of Kentucky, Lexington, USA  
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  ISSN 1069-9384 ISBN Medium  
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  Notes PMID:10780022 Approved no  
  Call Number refbase @ user @ Serial 248  
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Author Guth S.; Guth W. url  openurl
  Title Morality based on cognition in primates Type Journal Article
  Year 2000 Publication Journal of Consciousness Studies Abbreviated Journal  
  Volume (up) 7 Issue Pages 43-46  
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  Call Number refbase @ user @ Serial 3478  
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Author Ronald J. Schusterman; Colleen J. Reichmuth; David Kastak doi  openurl
  Title How Animals Classify Friends and Foes Type Journal Article
  Year 2000 Publication Current Directions in Psychological Science Abbreviated Journal Curr. Dir. Psychol. Sci.  
  Volume (up) 9 Issue Pages 1-6  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 3477  
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Author Clement, T.S.; Zentall, T.R. openurl 
  Title Development of a single-code/default coding strategy in pigeons Type Journal Article
  Year 2000 Publication Psychological science : a journal of the American Psychological Society / APS Abbreviated Journal Psychol Sci  
  Volume (up) 11 Issue 3 Pages 261-264  
  Keywords Animals; Attention; Columbidae; *Discrimination Learning; Female; Male; *Pattern Recognition, Visual; *Problem Solving; Retention (Psychology)  
  Abstract We tested the hypothesis that pigeons could use a cognitively efficient coding strategy by training them on a conditional discrimination (delayed symbolic matching) in which one alternative was correct following the presentation of one sample (one-to-one), whereas the other alternative was correct following the presentation of any one of four other samples (many-to-one). When retention intervals of different durations were inserted between the offset of the sample and the onset of the choice stimuli, divergent retention functions were found. With increasing retention interval, matching accuracy on trials involving any of the many-to-one samples was increasingly better than matching accuracy on trials involving the one-to-one sample. Furthermore, following this test, pigeons treated a novel sample as if it had been one of the many-to-one samples. The data suggest that rather than learning each of the five sample-comparison associations independently, the pigeons developed a cognitively efficient single-code/default coding strategy.  
  Address Department of Psychology, University of Kentucky, Lexington, KY 40506, USA  
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  ISSN 0956-7976 ISBN Medium  
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  Notes PMID:11273414 Approved no  
  Call Number refbase @ user @ Serial 246  
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Author Shettleworth, S.J. doi  openurl
  Title Cognitive ecology: field or label? Type Journal Article
  Year 2000 Publication Trends in Ecology & Evolution Abbreviated Journal Trends. Ecol. Evol  
  Volume (up) 15 Issue 4 Pages 161  
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  Address Depts of Psychology and Zoology, University of Toronto, Toronto, Ontario, Canada M5S 3G3  
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  ISSN 0169-5347 ISBN Medium  
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  Notes PMID:10717686 Approved no  
  Call Number refbase @ user @ Serial 373  
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Author Healy,S.; Braithwaite, V doi  openurl
  Title Cognitive ecology: a field of substance? Type Journal Article
  Year 2000 Publication Trends in Ecology & Evolution Abbreviated Journal Trends. Ecol. Evol  
  Volume (up) 15 Issue 1 Pages 22-26  
  Keywords Cognitive ecology; Neuroethology; Cognition; Ecology; Evolution; Orientation mechanisms  
  Abstract In 1993, Les Real invented the label 'cognitive ecology'. This label was intended for work that brought cognitive science and behavioural ecology together. Real's article stressed the importance of such an approach to the understanding of behaviour. At the end of a decade in which more interdisciplinary work on behaviour has been seen than for many years, it is time to assess whether cognitive ecology is a label describing an active field.  
  Address Division of Biological Sciences, King's Buildings, University of Edinburgh, West Mains Road, Edinburgh, UK EH9 3JT  
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  ISSN 0169-5347 ISBN Medium  
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  Notes PMID:10603501 Approved no  
  Call Number refbase @ user @ Serial 837  
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Author Jezierski T., Gorecka A. openurl 
  Title Changes in the horses heart rate during different levels of social isolation Type Journal Article
  Year 2000 Publication Animal Science Papers and Reports Abbreviated Journal Anim. Sci. Pap. Rep.  
  Volume (up) 18 Issue 1 Pages 33-41  
  Keywords horse; heart rate; human-animal relation  
  Abstract Social isolation in horses may be regarded as a stress factor which implies welfare problems. The aim of the experiment was to examine the effect of different levels of transient social isolation and human presence on the heart rate (HR) in horses. Seven horses were used and the experiment was conducted in a tether-stable without boxes. The HR was recorded electronically, continuously for 40 min during the following test situations: all horses in the stable; experimenter approaches the tested horse, other horses being untied and leaving the stable; tested horse staying alone or in the company of one or two stable-mates; the experimenter attempts to calm the isolated horse; outdoor auditory stimuli from other horses. The HR was significantly higher during the whole period of isolation, and depended on how many horses were left as company for the one tested. The highest HR was observed while other horses were leaving the stable and during perception of outdoor auditory stimuli from others. When in the company of two stable mates, the HR was elevated only while other horses were leaving the stable and during auditory stimuli from outdoors. Human presence evoked a significant increase in HR, probably due to conditioning of horses (expecting to be untied and allowed to join the others), irrespectively whether the tested horse was left alone or with one or two stable-mates.  
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  Call Number Equine Behaviour @ team @ Serial 4816  
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