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Author Call J
Title Inferences about the location of food in the great apes (Pan paniscus, Pan troglodytes, Gorilla gorilla, and Pongo pygmaeus) Type Journal Article
Year 2004 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.
Volume 118 Issue 2 Pages 232
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Abstract Bonobos (Pan paniscus; n = 4), chimpanzees (Pan troglodytes; n = 12), gorillas (Gorilla gorilla; n = 8), and orangutans (Pongo pygmaeus; n = 6) were presented with 2 cups (1 baited) and given visual or auditory information about their contents. Visual information consisted of letting subjects look inside the cups. Auditory information consisted of shaking the cup so that the baited cup produced a rattling sound. Subjects correctly selected the baited cup both when they saw or heard the food. Nine individuals were above chance in both visual and auditory conditions. More important, subjects as a group selected the baited cup when only the empty cup was either shown or shaken, which means that subjects chose correctly without having seen or heard the food (i.e., inference by exclusion). Control tests showed that subjects were not more attracted to noisy cups, avoided shaken noiseless cups, or learned to use auditory information as a cue during the study. It is concluded that subjects understood that the food caused the noise, not simply that the noise was associated with the food. (PsycINFO Database Record (c) 2010 APA, all rights reserved)
Address food location; inference ; apes;auditory information;visual information
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Call Number Equine Behaviour @ team @ Serial 3057
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Author Gardner, P.
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.
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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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Call Number Equine Behaviour @ team @ Serial 3592
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Author Hanggi, E.B.
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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Call Number Equine Behaviour @ team @ Serial 3678
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Author Pack, A. A.; Herman, L. M.
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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Call Number Equine Behaviour @ team @ Serial 4976
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Author Kubinyi, E.; Topál, J.; Miklósi, Á.; Csányi, V.
Title Dogs (Canis familiaris) learn their owners via observation in a manipulation task. Type Journal Article
Year 2003 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.
Volume 117 Issue 2 Pages 156-165
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Abstract Eighty-seven pet dogs (Canis familiaris) were involved in an experiment in which they had to solve a task to obtain a ball. After witnessing a full demonstration by their owner (10 times pushing the handle of the box, which released a ball), most dogs preferred to touch the handle sooner and more frequently in comparison with other parts of the box, and they used the handle to get the ball. In contrast dogs in 3 control groups developed their own respective methods. The lack of emergence of the ball and playing after the demonstration did not affect the learning performance strongly. This suggests that in dogs the outcome of a demonstration plays only a restricted role in the manifestation of social learning. (PsycINFO Database Record (c) 2010 APA, all rights reserved)
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Call Number Equine Behaviour @ team @ Serial 5210
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Author Pongrácz, P; Miklósi, Á; Timár-Geng, K; Csányi, V.
Title Verbal Attention Getting as a Key Factor in Social Learning Between Dog (Canis familiaris) and Human. Type Journal Article
Year 2004 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.
Volume 118 Issue 4 Pages 375-383.
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Abstract Pet dogs (Canis familiaris) learn to detour a V-shaped fence effectively from an unfamiliar human demonstrator. In this article, 4 main features of the demonstrator's behavior are highlighted: (a) the manipulation of the target, (b) the familiarity of the demonstrator, (c) the role of verbal attention-getting behavior, and (d) whether a strange trained dog could also be an effective demonstrator. The results show that the main factor of a successful human demonstration is the continuous verbal communication with the dog during detouring. It was also found that an unfamiliar dog demonstrator was as efficient as the unfamiliar experimenter. The experiments provide evidence that in adult dogs, communicative context with humans is needed for effective interspecific social learning to take place. (PsycINFO Database Record (c) 2010 APA, all rights reserved)
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Call Number Equine Behaviour @ team @ Serial 5218
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Author Baragli, P.; Vitale, V.; Paoletti, E.; Mengoli, M.; Sighieri, C.
Title Encoding the Object Position for Assessment of Short Term Spatial Memory in Horses (Equus caballus) Type Journal Article
Year 2011 Publication International Journal of Comparative Psychology Abbreviated Journal
Volume 24 Issue 3 Pages
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Abstract In this study, the detour problem was combined with the classic delayed-response task to investigate equine short-term spatial memory. Test subjects were eight female horses, divided into two groups (A and B) of four subjects each. The motivating object was made to move and disappear behind one oftwo identical obstacles in a two-point-choice apparatus. After a 10 s (Group A) or 30 s (Group B) delay the animal was released to seek the object. Both groups made more correct (14.8 ± 1.3 forGroup A and 13.5 ± 3.1 for Group B, mean ± SD) than incorrect choices (5.3 ± 1.3 for Group A and6.5 ± 3.1 for Group B, mean ± SD) and the performance of each group was significantly above chance level (z = 4.14,  p = 0.000, for Group A and z = 3.02, p = 0.002, for Group B). Therefore, tested animals were able to recover the object by approaching the correct obstacle after 10 s or 30 s delays, showing that they had encoded and recovered from memory the existence of the target object and its location.
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ISSN 2168-3344 ISBN Medium
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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 6178
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Author Kuczaj, S. A; Makecha, R.; Trone, M.; Paulos, R. D; Ramos, J. A.
Title Role of Peers in Cultural Innovation and Cultural Transmission: Evidence from the Play of Dolphin Calves Type Journal Article
Year 2006 Publication International Journal of Comparative Psychology Abbreviated Journal Int. J. Comp. Psychol
Volume 19 Issue 2 Pages 223-240
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Call Number Equine Behaviour @ team @ Serial 6526
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Author Custance, D.; Whiten, A.; Fredman, T.
Title Social learning of an artificial fruit task in capuchin monkeys (Cebus apella). Type Journal Article
Year 1999 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.
Volume 113 Issue 1 Pages 13-23
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Abstract Social learning in 11 human-raised capuchin monkeys (Cebus apella) was investigated using an artificial fruit that was designed as an analogue of natural foraging problems faced by primates. Each subject observed a human model open each of 3 principal components on the fruit in 1 of 2 alternative ways (“morphs”). The capuchin monkeys reproduced, to differing extents, the alternative techniques used for opening 1 component of the task (poking vs. pulling while twisting out a pair of smooth plastic bolts) but not the other 2. From the subjects' actions on the bolt latch, independent coders could recognize which morph they had witnessed, and they observed a degree of matching to the demonstrator's act consistent with simple imitation or object movement reenactment (A learns from watching B how an object, or parts of an object, move). Thus, these capuchins were capable of more complex social learning than has been recently ascribed to monkeys. (PsycINFO Database Record (c) 2016 APA, all rights reserved)
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Call Number Equine Behaviour @ team @ Serial 6563
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Author Dorey, N.R.; Conover, A.M.; Udell, M.A.R.
Title Interspecific communication from people to horses (Equus ferus caballus) is influenced by different horsemanship training styles Type Journal Article
Year 2014 Publication Journal of Comparative Psychology, Abbreviated Journal J. Comp. Psychol.
Volume 128 Issue 4 Pages 337-342
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Abstract The ability of many domesticated animals to follow human pointing gestures to locate hidden food has led to scientific debate on the relative importance of domestication and individual experience on the origins and development of this capacity. To further explore this question, we examined the influence of different prior training histories/methods on the ability of horses (Equus ferus caballus) to follow a momentary distal point. Ten horses previously trained using one of two methods (Parelli™ natural horsemanship or traditional horse training) were tested using a standard object choice task. The results show that neither group of horses was initially able to follow the momentary distal point. However, after more experience with the point, horses previously trained using the Parelli natural horsemanship method learned to follow momentary distal points significantly faster than those previously trained with traditional methods. The poor initial performance of horses on distal pointing tasks, coupled with the finding that prior training history and experimental experience can lead to success on this task, fails to support the predictions of the domestication hypothesis and instead lends support to the two-stage hypothesis. (PsycINFO Database Record (c) 2016 APA, all rights reserved)
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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 6564
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