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Author |
Mason, W.A.; Hollis, J.H. |
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Title |
Communication between young rhesus monkeys |
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Journal Article |
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Year |
1962 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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10 |
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3-4 |
Pages |
211-221 |
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1. 1. The communication performance of 12 rhesus monkeys was investigated in a situation in which the rewards of both members of a pair of monkeys could not exceed chance levels unless the operator monkey responded to cues provided by the informant monkey which indicated the location of food. Each member of the pair was trained in both operator and informant roles in different phases of the experiment. Communication performance improved progressively to levels consistently above chance. However, communication learning appeared to be specific to the role in which the individual was trained, and when roles were reversed no evidence of transfer was obtained. Tests of foodsharing behaviour showed a substantial increase in the tendency to share food with the partner following communication training. This occurred however, only when the partner was the only social stimulus present; if another monkey was also present there was no evidence of preferential responses to the partner. In all phases of communication training, monkeys which were housed together performed more efficiently than did monkeys housed individually.2. 2. The acquisition of stimulus-producing responses was investigated by causing an opaque screen to remain in front of the informant unless the operator monkey pulled a vertical lever at the front of its restraining cage. Initially, operators responded immediately to the foodcarts, but with further testing there was a steady increase in the tendency to defer the response to the food-carts until the lever had been pulled, revealing the informant monkey.3. 3. Transfer of communication training was tested with new monkey informants, and with two inanimate stimuli, a mechanical puppet, and a stationary plaque. The latter two objects were placed behind the rewarded food-carts before each trial. There was clear evidence of positive transfer to each of these conditions, but marked differences among conditions were obtained. Performance with the monkeys averaged 76 per cent. correct, as compared with 62 and 40 per cent., with the puppet and the plaque, respectively.4. 4. To test the ability of trained operator monkeys to select the appropriate informant on the basis of behavioural cues, the communication situation was arranged so that two informant monkeys were present on all trials. However, on any trial only one of these informants could be rewarded, and the operator's rewards were contingent upon delivering food to this informant. Efficiency of discrimination began at approximately 45 per cent, (chance = 25 per cent. and improved progressively to levels above 75 per cent. |
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Equine Behaviour @ team @ |
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3017 |
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Author |
Mitchell R |
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Title |
Self-recognition, methodology and explanation: a comment on Heyes (1994) |
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Journal Article |
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Year |
1995 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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51 |
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467 |
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Equine Behaviour @ team @ |
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3020 |
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Author |
Povinelli DJ; Gallup GG; Eddy TJ; Bierschwale DT; Engstrom MC |
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Title |
Chimpanzees recognize themselves in mirrors |
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1997 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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53 |
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1083 |
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Equine Behaviour @ team @ |
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3029 |
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Povinelli DJ; Nelson KE; Boysen ST |
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Title |
Comprehension of role reversal in chimpanzees: evidence of empathy? |
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1992 |
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Animal Behaviour. |
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Anim. Behav. |
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43 |
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633 |
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Equine Behaviour @ team @ |
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3031 |
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Author |
Hauser MD; Kralik J; Botto-Mahan C |
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Title |
Problem solving and functional design features: experiments on cotton-top tamarins, Saguinus oedipus oedipus |
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1999 |
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Animal Behaviour. |
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Anim. Behav. |
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57 |
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565 |
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Equine Behaviour @ team @ |
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3065 |
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Hauser MD; Pearson H; Seelig D |
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Title |
Ontogeny of tool use in cottontop tamarins, Saguinus oedipus: innate recognition of functionally relevant features |
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2002 |
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Animal Behaviour. |
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Anim. Behav. |
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64 |
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299 |
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Equine Behaviour @ team @ |
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3066 |
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Author |
Hauser MD; Santos LR; Spaepen GM; Pearson HE |
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Problem solving, inhibition and domain-specific experience: experiments on cotton-top tamarins, Saguinus oedipus |
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Journal Article |
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2002 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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64 |
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387 |
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Equine Behaviour @ team @ |
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3067 |
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Author |
Flannery, B. |
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Title |
Relational discrimination learning in horses |
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Journal Article |
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Year |
1997 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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54 |
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4 |
Pages |
267-280 |
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Horses; Shaping; Complex discrimination; Concept formation; Generalization ability; Training |
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Abstract |
This series of studies investigated horses' ability to learn the concept of sameness under several different conditions. Before experimentation began, three horses were shaped to touch individually presented stimuli with their muzzles, and then to make two responses to two matching cards from an array of three. A modified version of the identity matching-to-sample (IMTS) procedure was used to present stimuli in a variety of configural arrangements on a barn wall (Experiment 1 and Experiment 2), and on a flat panel mounted to a barn door (Experiment 3). The task in each experiment was to select the two stimulus cards that were the same (either circles or Xs) and to avoid the nonmatching stimulus card (either a star or a square). In Experiment 1, the mean accuracy rate for selecting the matching alternatives was 74%. The horses' accuracy levels reached a mean level of 83% during Experiment 2, in which they received additional trials and an intermittent secondary reinforcement schedule. In Experiment 3, when the stimuli were moved further apart from each other within arrangements and were presented on a novel background, the mean accuracy rate was 73%. These data demonstrate that horses can learn complex discrimination problems involving the concept of sameness, and that they are able to generalize this learning to a novel stimulus presentation situation. These results also suggest that a relational discrimination test may be useful for assessing horses' learning ability and the level of training appropriate for individual horses. |
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Equine Behaviour @ team @ |
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3557 |
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Author |
Murphy, J.; Waldmann, T.; Arkins, S. |
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Title |
Sex differences in equine learning skills and visuo-spatial ability |
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2004 |
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Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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87 |
Issue |
1-2 |
Pages |
119-130 |
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Horses; Sex differences; Visuo-spatial ability; Learning |
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There is evidence of superior visuo-spatial ability in males compared to females in most species investigated to-date. However, no known studies have addressed this issue in the equine. Equine visuo-spatial ability was investigated using a novel test apparatus with a sample of 62 horses (males=34 and females=28) during a series of six tests, where the horses were required to access a food source. The test apparatus consisted of a series of four adjacent stalls, each of which had a feed bin and a moveable barrier. The test apparatus was designed such that the breastplate barriers controlled and limited access by the horses to feed bins in all but one stall during each test. Male horses performed such that there were significant differences (P<0.05) in the ability of the subjects to complete all six tests in a mean time of 30 s or less per test. There were significant differences in mean completion times for male subjects between test 1 and test 2 (P<0.05), test 1 and test 3 (P<0.001), test 1 and test 4 (P<0.05) and test 1 and test 5 (P<0.05). There were no significant differences in mean completion times between any of the six tests for female subjects. Males had a lower mean total number of errors during all tests. Male horses also successfully completed significantly more tests than females (P<0.05). These results provide the first behavioural demonstration of superior visuo-spatial ability in male horses, similar to that reported in other species. |
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Equine Behaviour @ team @ |
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3560 |
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Author |
McCall, C.A. |
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Title |
The effect of body condition of horses on discrimination learning abilities |
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Year |
1989 |
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Applied Animal Behaviour Science |
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Appl. Anim. Behav. Sci. |
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22 |
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3-4 |
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327-334 |
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Discriminative learning abilities were studied in 12 mature, malnourished horses. All horses initially received a condition score (CS) between 2 and 4 on a scale of 1 (poor) to 9 (extremely fat). Then horses were assigned to one of 3 treatments based on their eventual, rehabilitated CS during discrimination testing: thin, CS 1-3; moderate, CS 4-6; and fat, CS 7-9. The discrimination learning task was performed for 14 days with a maximum of 20 trials per day. Daily criterion was set at eight consecutively correct trails. Total trials to first criteria and total errors during testing were recorded. Analysis of variance showed that treatments did not differ (P>0.05) in total trials to first criterion, however horses on the fat treatment did have higher total error scores (P<0.05) than horses on the thin or moderate treatments. This difference was probably owing to lack of motivation in the fat treatment horses, rather than to true learning ability differences. The sex of the horse did not significantly affect either learning score. |
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Equine Behaviour @ team @ |
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3570 |
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