Lack of referential vocal learning from LCD video by grey parrots <i>(Psittacus erithacus)</i>

Pepperberg, Irene M.; Wilkes, Steven R.

doi:10.1075/is.5.1.05pep

Cited by 41 publications

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“…Testing locations and living conditions when neither testing nor training was in progress were described in Pepperberg and Wilkes (2004). Food and water were available at his vocal request at all times during testing.…”

Section: Subjectmentioning

confidence: 99%

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

Pepperberg

2012

Anim Cogn

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A Grey parrot (Psittacus erithacus), able to quantify sets of eight or fewer items (including heterogeneous subsets), to sum two sequentially presented sets of 0–6 items (up to 6), and to identify and serially order Arabic numerals (1–8), all by using English labels (Pepperberg in J Comp Psychol 108:36–44, 1994; J CompPsychol 120:1–11, 2006a; J Comp Psychol 120:205–216,2006b; Pepperberg and Carey submitted), was tested on addition of two Arabic numerals or three sequentially presented collections (e.g., of variously sized jelly beans or nuts). He was, without explicit training and in the absence of the previously viewed addends, asked, "How many total?" and required to answer with a vocal English number label. In a few trials on the Arabic numeral addition, he was also shown variously colored Arabic numerals while the addends were hidden and asked "What color number (is the) total?" Although his death precluded testing on all possible arrays, his accuracy was statistically significant and suggested addition abilities comparable with those of nonhuman primates.

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Section: Subjectmentioning

confidence: 99%

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

Pepperberg

2012

Anim Cogn

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“…Previous studies undertaken on heterospecific language acquisition showed that even if our birds had difficulties learning new words rapidly, they were able to use our labels for their own purpose such as food requests (Giret et al, 2009b). Moreover, several studies confirm the necessity of interactions with humans for referential learning (Pepperberg, 1994b;Pepperberg & McLaughlin, 1996;Pepperberg & Wilkes, 2004).…”

Section:  Discussionmentioning

confidence: 77%

‘Unwilling’ versus ‘unable’

Péron

Rat‐Fischer

Nagle

et al. 2010

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Intentionality plays a fundamental part in human social interactions and we know that interpretation of behaviours of conspecifics depends on the intentions underlying them. Most of the studies on intention attribution were undertaken with primates. However, very little is known on this topic in animals more distantly related to humans such as birds. Three hand-reared African grey parrots (Psittacus erithacus) were tested on their ability to understand human intentional actions. The subjects' attention was not equally distributed across the conditions and their behavioural pattern also changed depending on the condition: the parrots showed more requesting behaviours (opening of the beak and request calls) when the experimenter was unwilling to give them seeds, and bit the wire mesh that represented the obstacle more when the experimenter was trying to give them food. For the first time we showed that a bird species, like primates, may be sensitive to behavioural cues of a human according to his intentions.

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“…Although Arthur had had about 3.5 years of intense human interaction, he had had the equivalent of only about a full year of communication training (i.e., he knew ''tickle'', ''hello'', a generic ''want some'', and two object labels; Pepperberg and Wilkes 2004). Housing is described in Pepperberg and Wilkes (2004).…”

Section: Subjectsmentioning

confidence: 99%

Individual differences in grey parrots (Psittacus erithacus): effects of training

Pepperberg

2007

J Ornithol

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Grey parrots (Psittacus erithacus) have been shown to exhibit many complex cognitive and communicative abilities in a laboratory setting. The parrots' successes likely rely on two factors: An underlying neurological architecture that supports complex information processing, and training that enables them to express their capacities in ways measurable by human researchers. Individual differences likely can affect both factors, in terms of biology for the former and in response to the quality of the latter, but the quality of the latter can be experimentally controlled. Although training my parrots to communicate in English speech generally enables me to demonstrate their advanced cognitive capacities, occasionally such training has interfered with success on tasks requiring a specific type of complex information processing. For two cohorts of parrots, one with and one without extensive communicative training, I describe here the results for two different tasks. In one task-the ability to segment English speech sounds and demonstrate phonological awareness-communication training, as expected, enhanced success [IM Pepperberg (2007) Lang Sci 29:1-13]. In the other task-retrieval of an item suspended from a long string to demonstrate meansends understanding-communication training unexpectedly inhibited success [IM Pepperberg (2004) Anim Cogn 7:263-266]. Individual differences can therefore be expressed in ways that are not necessarily predictable and that encourage further experimentation.

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Lack of referential vocal learning from LCD video by grey parrots (Psittacus erithacus)

Cited by 41 publications

References 0 publications

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

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

‘Unwilling’ versus ‘unable’

Individual differences in grey parrots (Psittacus erithacus): effects of training

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