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Author Langbein, J.; Nurnberg, G.; Puppe, B.; Manteuffel, G.
Title Self-Controlled Visual Discrimination Learning of Group-Housed Dwarf Goats (Capra hircus): Behavioral Strategies and Effects of Relocation on Learning and Memory Type Journal Article
Year 2006 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.
Volume 120 Issue 1 Pages 58-66
Keywords dwarf goats; visual discrimination; operant learning; learning strategies; context
Abstract In most studies on animal learning, individual animals are tested separately in a specific learning environment and with a limited number of trials per day. An alternative approach is to test animals in a familiar environment in their social group. In this study, the authors--applying a fully automated learning device--investigated voluntary, self-controlled visual shape discrimination learning of group-housed dwarf goats (Capra hircus). The majority of the tested goats showed successful shape discrimination, which indicates the adaptive value of an effective learning strategy. However, in each group, a few individual goats developed behavioral strategies different from shape discrimination to get reward. Relocation impairs memory retrieval (probably by attention shifting) only temporarily for previously learnt shapes. The results demonstrate the usefulness of a self-controlled learning paradigm to assess learning abilities of social species in their normal social settings. This may be especially relevant for captive animals to improve their welfare.
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Call Number Serial 2140
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Author Hare, B.; Tomasello, M.
Title Domestic Dogs (Canis familiaris) Use Human and Conspecific Social Cues to Locate Hidden Food Type Journal Article
Year 1999 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.
Volume 113 Issue 2 Pages 173-177
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Abstract Ten domestic dogs (Canis familiaris) of different breeds and ages were exposed to 2 different social cues indicating the location of hidden food, each provided by both a human informant and a conspecific informant (for a total of 4 different social cues). For the local enhancement cue, the informant approached the location where food was hidden and then stayed beside it. For the gaze and point cue, the informant stood equidistant between 2 hiding locations and bodily oriented and gazed toward the 1 in which food was hidden (the human informant also pointed). Eight of the 10 subjects, including the one 6-month-old juvenile, were above chance with 2 or more cues. Results are discussed in terms of the phylogenetic and ontogenetic processes by means of which dogs come to use social cues to locate food.
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Notes Approved no
Call Number refbase @ user @ Serial 590
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Author Miklosi, A.; Pongracz, P.; Lakatos, G.; Topal, J.; Csanyi, V.
Title A Comparative Study of the Use of Visual Communicative Signals in Interactions Between Dogs (Canis familiaris) and Humans and Cats (Felis catus) and Humans Type Journal Article
Year 2005 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.
Volume 119 Issue 2 Pages 179-186
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Abstract Dogs' (Canis familiaris) and cats' (Felis catus) interspecific communicative behavior toward humans was investigated. In Experiment 1, the ability of dogs and cats to use human pointing gestures in an object-choice task was compared using 4 types of pointing cues differing in distance between the signaled object and the end of the fingertip and in visibility duration of the given signal. Using these gestures, both dogs and cats were able to find the hidden food; there was no significant difference in their performance. In Experiment 2, the hidden food was made inaccessible to the subjects to determine whether they could indicate the place of the hidden food to a naive owner. Cats lacked some components of attention-getting behavior compared with dogs. The results suggest that individual familiarization with pointing gestures ensures high-level performance in the presence of such gestures; however, species-specific differences could cause differences in signaling toward the human.
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Notes Approved no
Call Number refbase @ user @ Serial 599
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Author Templeton, J. J.; Kamil, A. C.; Balda, R. P.
Title Sociality and social learning in two species of corvids: The pinyon jay (Gymnorhinus cyanocephalus) and the Clark's nutcracker (Nucifraga columbiana). Type Journal Article
Year 1999 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.
Volume 113 Issue 4 Pages 450-455
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Abstract The hypothesis that social learning is an adaptive specialization for social living predicts that social species should learn better socially than they do individually, but that nonsocial species should not exhibit a similar enhancement of performance under social learning conditions. The authors compared individual and social learning abilities in 2 corvid species: the highly social pinyon jay (Gymnorhinus cyanocephalus) and the less social Clark's nutcracker (Nucifraga columbiana). The birds were tested on 2 different tasks under individual and social learning conditions. Half learned a motor task individually and a discrimination task socially; the other half learned the motor task socially and the discrimination task individually. Pinyon jays learned faster socially than they did individually, but nutcrackers performed equally well under both learning conditions. Results support the hypothesis that social learning is an adaptive specialization for social living in pinyon jays. (PsycINFO Database Record (c) 2007 APA, all rights reserved)
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Call Number Equine Behaviour @ team @ Serial 2191
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Author Fragaszy, D.M.; Visalberghi E.
Title Social influences on the acquisition of tool-using behaviors in tufted capuchin monkeys (Cebus apella) Type Journal Article
Year 1989 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.
Volume 103 Issue 2 Pages 159-170
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Abstract To identify behaviors related to acquisition of tool-use in tufted capuchins (Cebus apella), we presented two tool-using tasks to two groups, extending findings by Westergaard and Fragaszy (1987) and Visalberghi (in press). Five Ss learned to use the tools in each task. The primary predictor of success was level of interest in the task. Observation of others at the apparatus did not facilitate exploratory behaviors or contact with the tools in the observers. Most animals performed exploratory behaviors more often when they were at the apparatus alone than when with another, whether or not the other was using a tool. Observers were quick to learn the relationship between another's activities and the appearance of food. We conclude that capuchins do not readily learn about instrumental relations by observation of others or imitate other's acts. Imitation probably plays no role in the spread of novel instrumental behaviors among monkeys. (PsycINFO Database Record (c) 2010 APA, all rights reserved)
Address social influences, acquisition of tool using
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Call Number Equine Behaviour @ team @ Serial 2993
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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
Keywords
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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Notes Approved yes
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
Keywords
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 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
Keywords
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 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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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 5210
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