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Lyn, H.; Savage-Rumbaugh, E.S. |
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Title |
Observational word learning in two bonobos (Pan paniscus): ostensive and non-ostensive contexts |
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2000 |
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Language & Communication |
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20 |
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3 |
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255-273 |
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Language acquisition; Bonobo; Fast mapping |
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Word learning has been extensively studied in humans. Children seem to be able to map new words onto objects with only one exposure to the referent. This ability has been called “fast mapping”(Carey, 1978 and Carey). Using a modified human paradigm, this paper explores two language-competent bonobos' (Pan paniscus) abilities to map new words to objects in realistic surroundings with few exposures to the referents. This paper also investigates the necessity of the apes maintaining visual contact (ostensive context) with the item to map the novel name onto the novel object. The bonobos tested in this experiment were able to map new words onto objects and could do so without visual contact with the items. |
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Equine Behaviour @ team @ |
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4675 |
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Potì, P.; Langer, J.; Savage-Rumbaugh, S.; Brakke, K.E. |
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Title |
Spontaneous logicomathematical constructions by chimpanzees (Pan troglodytes, P. paniscus) |
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Year |
1999 |
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Animal Cognition |
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Anim. Cogn. |
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2 |
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3 |
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147-156 |
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Two experiments investigated the spontaneous construction of precursory logicomathematical operations by human-enculturated and language-reared chimpanzees (Pan troglodytes, Pan paniscus) when they were interacting freely with objects. In experiment 1, three chimpanzees ranging in age from 6 to 18 years were presented with sets of six objects. Chimpanzees constructed equivalence, order and reversibility relations within single sets of objects as well as between two or three contemporaneous sets of objects. The chimpanzees' logicomathematical operations were more advanced, including infrequent and minimal operations on three sets, than those of some previously investigated younger nonenculturated common chimpanzees. In experiment 2, six chimpanzees ranging in age from 6 to 21 years were presented with sets of 12 objects. Chimpanzees constructed more advanced operations on single sets, but not on contemporaneous sets. The results suggest partial convergence and partial divergence between development of logicomathematical cognition in chimpanzees and humans. |
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Equine Behaviour @ team @ |
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3125 |
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Author |
Rumbaugh, D.M.; Savage-Rumbaugh, S.; Hegel, M.T. |
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Title |
Summation in the chimpanzee (Pan troglodytes) |
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1987 |
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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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13 |
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2 |
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107-115 |
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Animals; Choice Behavior; *Cognition; Male; *Mathematics; *Pan troglodytes; Visual Perception |
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In this research, we asked whether 2 chimpanzee (Pan troglodytes) subjects could reliably sum across pairs of quantities to select the greater total. Subjects were allowed to choose between two trays of chocolates. Each tray contained two food wells. To select the tray containing the greater number of chocolates, it was necessary to sum the contents of the food wells on each tray. In experiments where food wells contained from zero to four chocolates, the chimpanzees chose the greater value of the summed wells on more than 90% of the trials. In the final experiment, the maximum number of chocolates assigned to a food well was increased to five. Choice of the tray containing the greater sum still remained above 90%. In all experiments, subjects reliably chose the greater sum, even though on many trials a food well on the “incorrect” tray held more chocolates than either single well on the “correct” tray. It was concluded that without any known ability to count, these chimpanzees used some process of summation to combine spatially separated quantities. Speculation regarding the basis for summation includes consideration of perceptual fusion of pairs of quantities and subitization. |
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English |
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0097-7403 |
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PMID:3572305 |
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Equine Behaviour @ team @ |
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2785 |
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Author |
Savage De, R.L. |
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European eocene Equidae, Perissodactyla Equidae |
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1965 |
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Univ Calif Publ geol Sci Berkeley |
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56 |
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1-94 |
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from Professor Hans Klingels Equine Reference List |
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1556 |
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Savage; , A.O.; Kirsten Leong; Laura Graham; Anne |
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Title |
Behavioral indices of estrus in a group of captive African elephants (Loxodonta africana) |
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2005 |
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Zoo Biology |
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24 |
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4 |
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311-329 |
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This study investigated behavioral signals of estrus by systematically monitoring the interactions of one male with four female African elephants housed in a naturalistic outdoor enclosure at Disney's Animal Kingdom over a period of 11 months. We measured changes in five spatial behaviors and 22 tactile-contact behaviors, as well as changes in serum progestagen and LH concentrations, across three ovarian cycles for each female. Two females did not cycle during the study. Three different phases of the ovarian cycle were identified: mid luteal, anovulatory follicular, ovulatory follicular. The male followed more and carried out more genital inspections, flehmen, and trunk-to-mouth behaviors toward cycling females during their ovulatory phase. Genital inspections by the male peaked above baseline levels on the day of an LH surge, and up to 9 days before, in both cycling females and, thus, might be a useful behavioral index of estrus. The male also carried out more genital inspections, flehmen, and trunk touches to the back leg toward ovulatory cycling than noncycling females. Overall, our results indicated that: 1) a single subadult African elephant male could discriminate two females in the ovulatory phase of their cycle (i.e., during the 3 weeks preceding ovulation) from the mid luteal phase; 2) the male also discriminated two cycling females in the ovulatory and anovulatory follicular phases from two noncycling females; 3) two females in the ovulatory phase of the cycle displayed a greater variety of tactile-contact behavior toward the male compared to the other cycle phases. Zoo Biol 0:1-19, 2005. – 2005 Wiley-Liss, Inc. |
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1098-2361 |
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refbase @ user @ Savage;2005 |
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3552 |
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Author |
Tomasello M; Savage-Rumbaugh S; Kruger AC |
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Imitative learning of actions on objects by children, chimpanzees, and enculturated chimpanzees |
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1993 |
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Child Dev. |
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64 |
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1688 |
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Equine Behaviour @ team @ |
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3044 |
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Author |
Visalberghi E; Fragaszy DM; Savage-Rumbaugh ES |
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Performance in a tool-using task by common chimpanzees (Pan troglodytes), bonobos (Pan paniscus), an orangutan (Pongo pygmaeus), and capuchin monkeys (Cebus apella) |
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1995 |
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J. Comp. Psychol. |
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109 |
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52 |
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Equine Behaviour @ team @ |
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3077 |
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