Animal Cognition
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Interpretation of human pointing by African elephants: generalisation and rationality
Animal Cognition - Tập 17 - Trang 1365-1374 - 2014
Factors influencing the abilities of different animals to use cooperative social cues from humans are still unclear, in spite of long-standing interest in the topic. One of the few species that have been found successful at using human pointing is the African elephant (Loxodonta africana); despite few opportunities for learning about pointing, elephants follow a pointing gesture in an object-choic......
Gambling primates: reactions to a modified Iowa Gambling Task in humans, chimpanzees and capuchin monkeys
Animal Cognition - Tập 17 - Trang 983-995 - 2014
Humans will, at times, act against their own economic self-interest, for example, in gambling situations. To explore the evolutionary roots of this behavior, we modified a traditional human gambling task, the Iowa Gambling Task (IGT), for use with chimpanzees, capuchin monkeys and humans. We expanded the traditional task to include two additional payoff structures to fully elucidate the ways in wh......
Dogs steal in the dark
Animal Cognition - Tập 16 - Trang 385-394 - 2012
All current evidence of visual perspective taking in dogs can possibly be explained by dogs reacting to certain stimuli rather than understanding what others see. In the current study, we set up a situation in which contextual information and social cues are in conflict. A human always forbade the dog from taking a piece of food. The part of the room being illuminated was then varied, for example,......
Zebra finches and Dutch adults exhibit the same cue weighting bias in vowel perception
Animal Cognition - Tập 15 - Trang 155-161 - 2011
Vocal tract resonances, called formants, are the most important parameters in human speech production and perception. They encode linguistic meaning and have been shown to be perceived by a wide range of species. Songbirds are also sensitive to different formant patterns in human speech. They can categorize words differing only in their vowels based on the formant patterns independent of speaker i......
You talkin’ to me? An assessment of commands as play signals during dog–human play
Animal Cognition - Tập 24 - Trang 329-339 - 2021
During play with a dog, humans commonly command the dog to engage in particular activities. How effective are commands during play, and do they serve as play signals? To answer this question, I examined commands issued to dogs by 21 familiar and 17 unfamiliar persons who played with a dog, and the dog’s responses. Specifically, I examined dogs’ actions following commands containing the words (in d......
Responses to mirror-image stimulation in jungle crows (Corvus macrorhynchos)
Animal Cognition - Tập 3 - Trang 61-64 - 2000
Four jungle crows (Corvus macrorhynchos) were exposed to a mirror placed either vertically or horizontally. The most frequently observed behaviors were pecking at the mirror and wing flapping when looking toward the mirror. These behavior patterns, which were only rarely observed when the mirror was reversed, can be interpreted as aggressive behaviors against a conspecific. The vertical mirror ev......
Do capuchin monkeys use weight to select hammer tools?
Animal Cognition - Tập 11 - Trang 413-422 - 2008
The extent to which tool-using animals take into account the properties of the tool is little explored. The use of percussors to crack open encapsulated fruit is a complex form of tool use, the choice of an adequate tool being a critical aspect in success. Several properties (e.g., material, resistance, friability, shape and weight) affect the suitability of an object to open a hard-shelled nut, w......
Quantity discrimination by kittens of the domestic cat (Felis silvestris catus)
Animal Cognition - Tập 26 - Trang 1345-1352 - 2023
Quantitative abilities are well described in many species and in diverse life situations, including in the adult domestic cat. However, such abilities have been much less studied during ontogeny. In the present study we examined spontaneous quantity discrimination by pre-weaning age kittens in two-way food choice experiments. In Experiment 1, 26 kittens performed 12 trials with different ratios be......
Information seeking by orangutans: a generalized search strategy?
Animal Cognition - Tập 15 - Trang 293-304 - 2011
Recent empirical work has suggested that some species of non-human primates may be aware of their knowledge states. One finding to support this claim is that they seek information about the location of a hidden food item when they are unsure of its location, but not when they already know where it is, which purportedly demonstrates metacognition. However, this behaviour may instead reflect a gener......
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