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Author Gardner, P. doi  openurl
  Title Responses of horses to the same signal in different positions Type Journal Article
  Year 1937 Publication journal of Comparative Psychology, Abbreviated Journal J. Comp. Physiol  
  Volume 23 Issue 2 Pages 305-332.  
  Keywords  
  Abstract The horses were required to differentiate a box containing a black cloth from two associated boxes with no cloth. The correct box contained food. It differed in actual position with respect to the other boxes from trial to trial. After learning had occurred, the position of the cloth signal was changed. The changed positions produced many errors, the number of errors depending upon whether the cloth was higher or lower than the opening of the food box. Retests showed original learning to be relatively stable and unaffected. Factors influencing accuracy of discrimination were: contacts with cloth, position of box with respect to entrance, age of the horse (the younger made fewer errors), and breed and type of horse. There is evidence of some retention after three years. (PsycINFO Database Record (c) 2012 APA, all rights reserved)  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 3592  
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Author Pepperberg, I.M.; Brezinsky, M.V. doi  openurl
  Title Acquisition of a relative class concept by an African gray parrot (Psittacus erithacus): discriminations based on relative size Type Journal Article
  Year 1991 Publication Journal of Comparative Psychology Abbreviated Journal J Comp Psychol  
  Volume 105 Issue 3 Pages 286-294  
  Keywords Animals; Aptitude; *Concept Formation; *Discrimination Learning; Form Perception; Male; Mental Recall; *Parrots; *Size Perception; Vocalization, Animal  
  Abstract We report that an African gray parrot (Psittacus erithacus), Alex, responds to stimuli on a relative basis. Previous laboratory studies with artificial stimuli (such as pure tones) suggest that birds make relational responses as a secondary strategy, only after they have acquired information about the absolute values of the stimuli. Alex, however, after learning to respond to a small set of exemplars on the basis of relative size, transferred this behavior to novel situations that did not provide specific information about the absolute values of the stimuli. He responded to vocal questions about which was the larger or smaller exemplar by vocally labeling its color or material, and he responded “none” if the exemplars did not differ in size. His overall accuracy was 78.7%.  
  Address Northwestern University  
  Corporate Author Thesis  
  Publisher (down) Place of Publication Washington, D.C. : 1983 Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0735-7036 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:1935007 Approved yes  
  Call Number Equine Behaviour @ team @ Serial 3610  
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Author Hanggi, E.B. url  openurl
  Title Categorization Learning in Horses (Equus caballus) Type Journal Article
  Year 1999 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.  
  Volume 113 Issue 3 Pages 243-252  
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  Abstract Categorization learning was investigated in 2 horses (Equus caballus). Both horses learned to select a 2-dimensional black stimulus with an open center instead of a filled stimulus in a 2-choice discrimination task. After a criterion of 10 out of 10 correct responses in a random series for 2 consecutive sessions was reached, 15 additional pairs of open-center versus filled stimuli were tested. Each was run to criterion and then incorporated into sessions of randomly mixed problems. Both horses solved the 1st problem by simple pattern discrimination and showed evidence of categorical processing for subsequent problems. New pairs were learned with few or no errors, and correct responses on novel trials were significantly above chance. These results suggest that the horses were making their selections on the basis of shared characteristics with the training stimuli and were using categorization skills in problem solving.  
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  Notes Approved yes  
  Call Number Equine Behaviour @ team @ Serial 3678  
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Author Schwab, C.; Huber, L. url  doi
openurl 
  Title Obey or not obey? Dogs (Canis familiaris) behave differently in response to attentional states of their owners Type Journal Article
  Year 2006 Publication Journal of Comparative Psychology (Washington, D.C. : 1983) Abbreviated Journal J Comp Psychol  
  Volume 120 Issue 3 Pages 169-175  
  Keywords Animals; *Attention; Awareness; *Bonding, Human-Pet; *Cooperative Behavior; Cues; Dogs/*psychology; Humans; Motivation; *Nonverbal Communication; Social Perception; *Speech Perception; *Verbal Behavior  
  Abstract Sixteen domestic dogs (Canis familiaris) were tested in a familiar context in a series of 1-min trials on how well they obeyed after being told by their owner to lie down. Food was used in 1/3 of all trials, and during the trial the owner engaged in 1 of 5 activities. The dogs behaved differently depending on the owner's attention to them. When being watched by the owner, the dogs stayed lying down most often and/or for the longest time compared with when the owner read a book, watched TV, turned his or her back on them, or left the room. These results indicate that the dogs sensed the attentional state of their owners by judging observable behavioral cues such as eye contact and eye, head, and body orientation.  
  Address Department for Behavior, Neurobiology and Cognition, University of Vienna, Vienna, Austria. cpriberskyschwab@yahoo.de  
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  ISSN 0735-7036 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:16893253 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4961  
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Author Soproni, K.; Miklósi, Á.; Topál, J.; Csányi, V. url  doi
openurl 
  Title Dogs' (Canis familiaris) responsiveness to human pointing gestures Type Journal Article
  Year 2002 Publication Journal of Comparative Psychology (Washington, D.C. : 1983) Abbreviated Journal J Comp Psychol  
  Volume 116 Issue 1 Pages 27-34  
  Keywords Analysis of Variance; Animals; *Behavior, Animal; Choice Behavior; Dogs/*psychology; Female; Gestures; Male; *Recognition (Psychology); Species Specificity  
  Abstract In a series of 3 experiments, dogs (Canis familiaris) were presented with variations of the human pointing gesture: gestures with reversed direction of movement, cross-pointing, and different arm extensions. Dogs performed at above chance level if they could see the hand (and index finger) protruding from the human body contour. If these minimum requirements were not accessible, dogs still could rely on the body position of the signaler. The direction of movement of the pointing arm did not influence the performance. In summary, these observations suggest that dogs are able to rely on relatively novel gestural forms of the human communicative pointing gesture and that they are able to comprehend to some extent the referential nature of human pointing.  
  Address Department of Ethology, Eotvos Lorand University, Budapest, Hungary. krisztinasoproni@hotmail.com  
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  ISSN 0735-7036 ISBN Medium  
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  Notes PMID:11926681 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4962  
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Author Soproni, K.; Miklósi, A.; Topál, J.; Csányi, V. url  doi
openurl 
  Title Comprehension of human communicative signs in pet dogs (Canis familiaris) Type Journal Article
  Year 2001 Publication Journal of Comparative Psychology (Washington, D.C. : 1983) Abbreviated Journal J Comp Psychol  
  Volume 115 Issue 2 Pages 122-126  
  Keywords Animals; *Behavior, Animal; Choice Behavior; Dogs/*psychology; Female; Humans; Male; Nonverbal Communication/*psychology; *Recognition (Psychology); *Social Behavior  
  Abstract On the basis of a study by D. J. Povinelli, D. T. Bierschwale, and C. G. Cech (1999), the performance of family dogs (Canis familiaris) was examined in a 2-way food choice task in which 4 types of directional cues were given by the experimenter: pointing and gazing, head-nodding (“at target”), head turning above the correct container (“above target”), and glancing only (“eyes only”). The results showed that the performance of the dogs resembled more closely that of the children in D. J. Povinelli et al.'s study, in contrast to the chimpanzees' performance in the same study. It seems that dogs, like children, interpret the test situation as being a form of communication. The hypothesis is that this similarity is attributable to the social experience and acquired social routines in dogs because they spend more time in close contact with humans than apes do, and as a result dogs are probably more experienced in the recognition of human gestures.  
  Address Department of Ethology, Budapest, Hungary. lavina@ludens.elte.hu  
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  ISSN 0735-7036 ISBN Medium  
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  Notes PMID:11459158 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4963  
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Author Hostetter, A.B.; Cantero, M.; Hopkins, W.D. url  openurl
  Title Differential use of vocal and gestural communication by chimpanzees (Pan troglodytes) in response to the attentional status of a human (Homo sapiens) Type Journal Article
  Year 2001 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.  
  Volume 115 Issue 4 Pages 337-343  
  Keywords Animals; *Attention; *Communication Methods, Total; Female; *Gestures; Humans; Male; Motivation; Pan troglodytes/*psychology; Social Environment; Species Specificity; *Vocalization, Animal  
  Abstract This study examined the communicative behavior of 49 captive chimpanzees (Pan troglodytes), particularly their use of vocalizations, manual gestures, and other auditory- or tactile-based behaviors as a means of gaining an inattentive audience's attention. A human (Homo sapiens) experimenter held a banana while oriented either toward or away from the chimpanzee. The chimpanzees' behavior was recorded for 60 s. Chimpanzees emitted vocalizations faster and were more likely to produce vocalizations as their 1st communicative behavior when a human was oriented away from them. Chimpanzees used manual gestures more frequently and faster when the human was oriented toward them. These results replicate the findings of earlier studies on chimpanzee gestural communication and provide new information about the intentional and functional use of their vocalizations.  
  Address Department of Psychology, Berry College, USA  
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  ISSN 0735-7036 ISBN Medium  
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  Notes PMID:11824896 Approved yes  
  Call Number Equine Behaviour @ team @ Serial 4970  
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Author Pack, A. A.; Herman, L. M. doi  openurl
  Title Bottlenosed Dolphins (Tursiops truncatus) Comprehend the Referent of Both Static and Dynamic Human Gazing and Pointing in an Object-Choice Task. Type Journal Article
  Year 2004 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.  
  Volume 118 Issue 2 Pages 160-171  
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  Abstract The authors tested 2 bottlenosed dolphins (Tursiops truncatus) for their understanding of human-directed gazing or pointing in a 2-alternative object-choice task. A dolphin watched a human informant either gazing at or pointing toward 1 of 2 laterally placed objects and was required to perform a previously indicated action to that object. Both static and dynamic gaze, as well as static and dynamic direct points and cross-body points, yielded errorless or nearly errorless performance. Gaze with the informant's torso obscured (only the head was shown) produced no performance decrement, but gaze with eyes only resulted in chance performance. The results revealed spontaneous understanding of human gaze accomplished through head orientation, with or without the human informant's eyes obscured, and demonstrated that gaze-directed cues were as effective as point-directed cues in the object-choice task. (PsycINFO Database Record (c) 2009 APA, all rights reserved)  
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  Notes Approved yes  
  Call Number Equine Behaviour @ team @ Serial 4976  
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Author Shapiro, A.D.; Janik, V.M.; Slater, P.J.B. url  doi
openurl 
  Title A gray seal's (Halichoerus grypus) responses to experimenter-given pointing and directional cues Type Journal Article
  Year 2003 Publication Journal of Comparative Psychology Abbreviated Journal J Comp Psychol  
  Volume 117 Issue 4 Pages 355-362  
  Keywords Animals; Behavior, Animal/*physiology; Cognition/physiology; Conditioning, Operant/physiology; *Cues; Eye Movements/physiology; Female; Seals, Earless  
  Abstract A gray seal (Halichoerus grypus) was trained to touch a target on its left or right by responding to pointing signals. The authors then tested whether the seal would be able to generalize spontaneously to altered signals. It responded correctly to center pointing and head turning, center upper body turning, and off-center pointing but not to head turning and eye movements alone. The seal also responded correctly to brief ipsilateral and contralateral points from center and lateral positions. Pointing gestures did not cause the seal to select an object placed centrally behind it. Like many animals in similar studies, this gray seal probably did not understand the referential character of these gestures but rather used signal generalization and experience from initial operant conditioning to solve these tasks.  
  Address School of Biology, University of St Andrews, St Andrews, Fife, United Kingdom  
  Corporate Author Thesis  
  Publisher (down) Place of Publication Washington, D.C. : 1983 Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0735-7036 ISBN Medium  
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  Notes PMID:14717636 Approved yes  
  Call Number Equine Behaviour @ team @ Serial 4977  
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Author Gosling, S.D. url  doi
openurl 
  Title Personality dimensions in spotted hyenas (Crocuta crocuta) Type Journal Article
  Year 1998 Publication Journal of Comparative Psychology (Washington, D.C. : 1983) Abbreviated Journal J Comp Psychol  
  Volume 112 Issue 2 Pages 107-118  
  Keywords Animals; Carnivora/*psychology; Female; Humans; Male; *Personality; Personality Assessment/statistics & numerical data; Psychometrics; Reproducibility of Results; Species Specificity; Temperament  
  Abstract Personality ratings of 34 spotted hyenas (Crocuta crocuta) were made by 4 observers who knew the animals well. Analyses suggest that (a) hyena personality traits were rated with generally high reliability; (b) 5 broad dimensions (Assertiveness, Excitability, Human-Directed Agreeableness, Sociability, and Curiosity) captured about 75% of the total variance; (c) this dimensional structure could not be explained in terms of dominance status, sex, age, or appearance; and (d) as expected, female hyenas were more assertive than male hyenas. Comparisons with previous research provide evidence for the cross-species generality of Excitability, Sociability, and especially Assertiveness. Discussion focuses on methodological issues in research on animal personality and on the potential contributions this research can make for understanding the biological and environmental bases of personality.  
  Address Department of Psychology, University of California, Berkeley 94720-1650, USA. samiam@uclink.berkeley.edu  
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  ISSN 0735-7036 ISBN Medium  
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  Notes PMID:9642781 Approved no  
  Call Number Equine Behaviour @ team @ Serial 5019  
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