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Fagot, J.; Cook, R.G. |
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Evidence for large long-term memory capacities in baboons and pigeons and its implications for learning and the evolution of cognition |
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2006 |
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Proc Natl Acad Sci U S A |
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103 |
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Equine Behaviour @ team @ Fagot2006 |
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6278 |
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Fabre-Thorpe, M.; Fagot, J.; Lorincz, E.; Levesque, F.,; Vauclair, J. |
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Title |
Laterality in cats: Paw preference and performance in a visuomotor activity. |
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1993 |
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Cortex |
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Cortex |
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29 |
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15-24 |
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In a two-choice discrimination paradigm, a bottlenose dolphin discriminated relational dimensions between visual numerosity stimuli under monocular viewing conditions. After prior binocular acquisition of the task, two monocular test series with different number stimuli were conducted. In accordance with recent studies on visual lateralization in the bottlenose dolphin, our results revealed an overall advantage of the right visual field. Due to the complete decussation of the optic nerve fibers, this suggests a specialization of the left hemisphere for analysing relational features between stimuli as required in tests for numerical abilities. These processes are typically right hemisphere-based in other mammals (including humans) and birds. The present data provide further evidence for a general right visual field advantage in bottlenose dolphins for visual information processing. It is thus assumed that dolphins possess a unique functional architecture of their cerebral asymmetries. |
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Bottlenose dolphin; Hemispheric specialization; Monocular vision; Numerical ability |
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Equine Behaviour @ team @ |
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5367 |
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Fagot, J.; Kruschke, J.K.; Dépy, D.; Vauclair, J. |
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Associative learning in baboons (Papio papio) and humans (Homo sapiens): species differences in learned attention to visual features |
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1998 |
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Animal Cognition |
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Anim. Cogn. |
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1 |
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2 |
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123-133 |
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We examined attention shifting in baboons and humans during the learning of visual categories. Within a conditional matching-to-sample task, participants of the two species sequentially learned two two-feature categories which shared a common feature. Results showed that humans encoded both features of the initially learned category, but predominantly only the distinctive feature of the subsequently learned category. Although baboons initially encoded both features of the first category, they ultimately retained only the distinctive features of each category. Empirical data from the two species were analyzed with the 1996 ADIT connectionist model of Kruschke. ADIT fits the baboon data when the attentional shift rate is zero, and the human data when the attentional shift rate is not zero. These empirical and modeling results suggest species differences in learned attention to visual features. |
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Equine Behaviour @ team @ |
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3267 |
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Wasserman, E.A.; Young, M.E.; Fagot, J. |
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Title |
Effects of number of items on the baboon's discrimination of same from different visual displays |
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2001 |
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Animal Cognition |
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Anim. Cogn. |
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4 |
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3 |
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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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Fagot, J.; Tomonaga, M. |
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Effects of element separation on perceptual grouping by humans (Homo sapiens) and chimpanzees (Pan troglodytes): perception of Kanizsa illusory figures |
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2001 |
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Animal Cognition |
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Anim. Cogn. |
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4 |
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3 |
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171-177 |
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The processing of Kanizsa-square illusory figures was studied in two experiments with four humans and two chimpanzees. Subjects of the two species were initially trained to select a Kanizsa-square illusory figure presented in a computerized two-alternative forced choice task. After training, adding narrow closing segments to the pacman inducers that composed the Kanisza illusory figures lowered performance in both chimpanzees and humans, suggesting that the discrimination could be controlled by the perception of illusory forms. A second experiment assessed transfer of performance with five sets of figures in which the size of the inducers and their separation were manipulated. Only for chimpanzees was performance directly controlled by separation, suggesting that chimpanzees are more sensitive than humans to the separation between visual elements. |
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Equine Behaviour @ team @ |
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3172 |
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Fagot, J.; Wasserman, E.A.; Young, M.E. |
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Title |
Discriminating the relation between relations: the role of entropy in abstract conceptualization by baboons (Papio papio) and humans (Homo sapiens) |
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2001 |
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Journal of Experimental Psychology. Animal Behavior Processes |
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J Exp Psychol Anim Behav Process |
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27 |
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4 |
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316-328 |
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Animals; Behavior, Animal; Choice Behavior; Cognition/physiology; *Discrimination (Psychology); Discrimination Learning; *Entropy; Female; Humans; Judgment/*physiology; Male; Papio |
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Two baboons (Papio papio) successfully learned relational matching-to-sample: They picked the choice display that involved the same relation among 16 pictures (same or different) as the sample display, although the sample display shared no pictures with the choice displays. The baboons generalized relational matching behavior to sample displays created from novel pictures. Further experiments varying the number of sample pictures and the mixture of same and different sample pictures suggested that entropy plays a key role in the baboons' conceptual behavior. Two humans (Homo sapiens) were similarly trained and tested; their behavior was both similar to and different from the baboons' behavior. The results suggest that animals other than humans and chimpanzees can discriminate the relation between relations. They further suggest that entropy detection may underlie same-different conceptualization, but that additional processes may participate in human conceptualization. |
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Comparative Cognition Research Group, Center for Research in Cognitive Neurosciences, 31 Chemin Joseph Aiguier, 13402 Marseille, France. fagot@lnf.cnrs-mrs.fr |
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English |
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0097-7403 |
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PMID:11676083 |
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Equine Behaviour @ team @ |
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2772 |
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