Further evidence for addition and numerical competence by a Grey parrot (Psittacus erithacus)

Pepperberg, Irene M.

doi:10.1007/s10071-012-0470-5

Cited by 76 publications

(44 citation statements)

References 28 publications

(61 reference statements)

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“…Rhesus monkeys (Brannon & Terrance, 1998 can judge the ordinal relationship of a number of different figures on a computer monitor. Pigeons can learn a symbolic matching-to-sample task in which they have to respond to symbols representing numbers (Xia, Emmerton, Siemann, & Delius, 2001;Xia, Siemann, & Delius, 2000), while an African Grey parrot could give a vocal answer to the number of objects or the sum of two cardinal numbers (Pepperberg, 1994(Pepperberg, , 2012.…”

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confidence: 99%

Acquisition and Limited Transfer of Numerical Discrimination of Object Stimuli in Rats

Kamijo

Taniuchi

2014

Psychol Rec

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A series of experiments explored rats' ability to learn abstract ordinal position of object stimuli to investigate their numerical competence. Three of four Long-Evans rats, trained to respond to the third of six objects in a line, reliably learned this task in three different trials with three different stimulus objects. As the objects' spatial location was changed trial-by-trial, spatial position of stimuli could not serve as an effective discriminative cue. In the first transfer test, trials with three novel objects were used as probe tests to the original training. In the second test, rats were trained with all six objects, and then given three novel test stimuli. During the transfer test period, rats maintained good performance with training stimuli, whereas most responses to probe tests were at chance level, showing limited transfer of counting behavior to novel stimuli. Results are discussed in terms of stimulus-specific learning and domainrestricted concept learning.

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confidence: 99%

Acquisition and Limited Transfer of Numerical Discrimination of Object Stimuli in Rats

Kamijo

Taniuchi

2014

Psychol Rec

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“…He was capable of giving the similar and/or different characteristics of the items presented [77,78]. He was also able to identify the number of items according to two modalities [79,80]. Alex's categorization was noteworthy because he expressed this classification by verbalizing labels.…”

Section: Categorizationmentioning

confidence: 99%

“…Alex learned to quantify sets of objects with vocal labels [79], choose the set corres ponding to the vocal number label [80], utter the corres ponding number label in response to the presentation of the number symbol and to select the number corresponding to the vocal number label [85]. Griffin is currently tested on visual perception.…”

Section: Numerical Competencies and Optical Illusionmentioning

confidence: 99%

Language-Trained Animals: A Window to the “Black Box”

Péron¹

2012

IJIS

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Animals have to process quantity of information in order to take decisions and adapt their behaviors to their physical and social environment. They have to remember previous events (learning), to cope with their internal (motivational and emotional) states and to display flexible behavioral responses. From a human point of view it is quite impossible to access all those information, not only because of the sensorial channels used that can vary but also because all the processing phase occurs in the "black box" and non-human animals are not able to express verbally what they think, feel or want. Though useful information might lie in the "collected data" (animal mind), extracting them into insightful knowledge with human-accessible form (clear meaning, no interpretation) presents a demanding and sophisticated undertaking. Several scientists decided to trained different individuals from several species (apes, dolphins, grey parrots, dogs) in order to teach them a new communicative system that they could share with us. Here, the different studies (techniques and species used) are presented, the constrains but also the main findings.

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“…Chimpanzees can add Arabic numerals to obtain a reward [5]. Pigeons can associate a number of seeds with a symbol and peck the one that leads to a larger reward [30], and a parrot was reported to have learned to associate the vocalization of numerals with the corresponding number of objects [31]. …”

Section: Introductionmentioning

confidence: 99%

Symbol-value association and discrimination in the archerfish

2017

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One of the most important aspects of mathematical cognition in humans is the ability to symbolically represent magnitudes and quantities. In the last 20 years it has been shown that not only humans but also other primates, birds and dolphins can use symbolic representation of quantities. However, it remains unclear to what extent this ability is spread across the animal kingdom. Here, by training archerfish to associate variable amounts of rewards with different geometric shapes, we show for the first time that lower vertebrates can also associate a value with a symbol and make a decision that maximizes their food intake based on this information. In addition, the archerfish is able to understand up to four different quantities and organize them mentally in an ordinal manner, similar to observations in higher vertebrates. These findings point in the direction of the existence of an approximate magnitude system in fish.

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Further evidence for addition and numerical competence by a Grey parrot (Psittacus erithacus)

Cited by 76 publications

References 28 publications

Acquisition and Limited Transfer of Numerical Discrimination of Object Stimuli in Rats

Acquisition and Limited Transfer of Numerical Discrimination of Object Stimuli in Rats

Language-Trained Animals: A Window to the “Black Box”

Symbol-value association and discrimination in the archerfish

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