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| Author |
Custance, D.; Whiten, A.; Sambrook, T.; Galdikas, B. |
| Title |
Testing for social learning in the “artificial fruit” processing of wildborn orangutans (Pongo pygmaeus), Tanjung Puting, Indonesia |
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Journal Article |
Year  |
2001 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
4 |
Issue |
3 |
Pages |
305-313 |
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| Abstract |
Social learning about actions, objects and sequencing was investigated in a group of 14 wildborn orangutans (four adult females and ten 3- to 5-year-old juveniles). Human models showed alternative methods and sequences for dismantling an artificial fruit to groups of participants matched by gender and age. Each participant received three to six 2-min trials in which they were given access to the artificial fruit for manipulation. Independent coders, who were unaware of which method each participant had seen, gave confidence ratings and collected action frequencies from watching video recordings of the experimental trials. No significant differences were found between groups in terms of the coders' confidence ratings, the action frequencies or the sequence of manipulations. These negative results may at least partly reflect the immaturity of a large proportion of the participants. A positive correlation was found between age and the degree of matching to the method shown. Although none of the juveniles succeeded in opening the “fruit”, two out of the four adults did so and they also seemed to match more closely the sequence of elements touched over successive trials. The results are compared with similar data previously collected from human children, chimpanzees, gorillas, capuchin monkeys and common marmosets. |
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Equine Behaviour @ team @ |
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3370 |
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| Author |
Arthur, D.; Levin, E. |
| Title |
Spatial and non-spatial visual discrimination learning in zebrafish (Danio rerio) |
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Journal Article |
| Year |
2001 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
4 |
Issue |
2 |
Pages |
125-131 |
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| Abstract |
Zebrafish (Danio rerio) provide an excellent model for assessment of molecular processes of neurodevelopment. To determine the functional importance of molecular events during neurodevelopment, we have developed methods for assessing learning in zebrafish in a three-chambered fish tank. In the first study, simple escape response was assessed. Zebrafish tested with a moving net learned to escape to another chamber more rapidly over the six sessions of training than the fish with the still net which did not learn. Upon reversal of the contingencies, the fish switched to the inactive net rapidly learned to suppress the escape response and fish formerly in the inactive net condition learned to avoid the moving net. In the second study, spatial discrimination learning was assessed. Zebrafish were trained on a right-left position discrimination to avoid the active net. Zebrafish showed significant improvement in escape responses over six sessions of training with three trials per session. In the third study, red-blue non-spatial discrimination learning was assessed. There was a significant improvement over the first six training sessions. With the reversal of contingencies, there was a significant decline of performance. With continued training, the fish again significantly improved avoidance. These studies found an effective motivational stimulus and procedure for studying escape behavior in zebrafish; a procedure whereby zebrafish would learn both spatial and non-spatial discrimination. These methods are being developed to help determine the functional importance of molecular events during zebrafish neurodevelopment. |
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Equine Behaviour @ team @ |
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3372 |
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Addessi, E.; Visalberghi, E. |
| Title |
Social facilitation of eating novel food in tufted capuchin monkeys (Cebus apella): input provided by group members and responses affected in the observer |
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Journal Article |
| Year |
2001 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
4 |
Issue |
3 |
Pages |
297-303 |
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Learning about food palatability from watching what conspecifics eat might be one of the advantages of group living. A previous study investigated whether group members' presence or eating activity account for social facilitation of eating of foods never previously tasted. Capuchins encountered novel colored foods when (1) alone (Alone condition) or (2) with group members visible in the nearby cage (Group-present condition) or (3) with group members present and eating a familiar food that had not been colored (Group+food condition). Social facilitation of eating occurred when group members were eating, despite the difference in color between the familiar food eaten by them and the novel food presented to the experimental subject. To clarify what subjects learnt from group members when social facilitation occurred, we further analyze here the data from the previous study. The number of visual exposures to the colored novel food (as a group member) correlated with increased consumption of that novel food when encountered later (as experimental subject). In contrast, the number of times that an individual fed on the familiar food (as a group member) did not decrease its consumption of novel food (as experimental subject). Therefore, capuchins (1) habituated to the colors of the novel foods, and (2) did not take into account that seeing group members eating a food does not provide information about the palatability of a differently colored food. Since social facilitation of eating occurs when foods do not match in color, at least in capuchins, social facilitation of eating should not be considered as a way of learning about a safe diet, but rather as a way of overcoming neophobia. |
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Equine Behaviour @ team @ |
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3382 |
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Wasserman, E.A.; Young, M.E.; Fagot, J. |
| Title |
Effects of number of items on the baboon's discrimination of same from different visual displays |
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Journal Article |
| Year |
2001 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
4 |
Issue |
3 |
Pages |
163-170 |
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Three experiments explored the baboon's discrimination of visual displays that comprised 2 to 24 black-and-white computer icons; the displayed icons were either the same as ( same) or different from one another ( different). The baboons' discrimination of same from different displays was a positive function of the number of icons. When the number of icons was decreased to 2 or 4, the baboons responded indiscriminately to the same and different displays, exhibiting strong position preferences. These results are both similar to and different from those of pigeons that were trained and tested under comparable conditions. |
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Equine Behaviour @ team @ |
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3393 |
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Quinn P.C.; Eimas P.D.; Tarr M.J. |
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Perceptual Categorization of Cat and Dog Silhouettes by 3- to 4-Month-Old Infants |
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2001 |
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Journal of Experimental Child Psychology |
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79 |
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78-94 |
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3474 |
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Mushiake H.; Saito N.; Sakamoto K.; Sato Y.; Tanji J. |
| Title |
Visually based path-planning by Japanese monkeys |
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2001 |
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Cognitive Brain Research |
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11 |
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165-169 |
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3476 |
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Hampton, R.R. |
| Title |
Animal Minds: Beyond Cognition to Consciousness |
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2001 |
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Ethology |
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Ethology |
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107 |
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1055-1056 |
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3487 |
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Kirkwood, J.K.; Hubrecht, R. |
| Title |
Animal Consciousness, Cognition and Welfare |
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2001 |
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Animal Welfare |
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10 |
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5-17 |
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3488 |
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Dawkins, M.S. |
| Title |
Who Needs Consciousness? |
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2001 |
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Animal Welfare |
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10 |
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19-29 |
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refbase @ user @ |
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3489 |
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| Author |
Taylor, J.G. |
| Title |
What do Neuronal Network Models of the Mind Indicate about Animal Consciousness? |
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2001 |
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Animal Welfare |
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10 |
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63-75 |
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3490 |
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