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Bo-NO-bouba-kiki : picture-word mapping but no spontaneous sound symbolic speech-shape mapping in a language trained bonobo

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Date
09/02/2022
Author
Margiotoudi, Konstantina
Bohn, Manuel
Schwob, Natalie
Taglialatela, Jared
Pulvermüller, Friedemann
Epping, Amanda
Schweller, Ken
Allritz, Matthias
Funder
European Research Council
Grant ID
609819
Keywords
Neuroscience and cognition
Research articles
Sound symbolism
Language evolution
Kanzi
Bouba-kiki
QL Zoology
BF Psychology
DAS
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Abstract
Humans share the ability to intuitively map ‘sharp’ or ‘round’ pseudowords, such as ‘bouba’ versus ‘kiki’, to abstract edgy versus round shapes, respectively. This effect, known as sound symbolism, appears early in human development. The phylogenetic origin of this phenomenon, however, is unclear: are humans the only species capable of experiencing correspondences between speech sounds and shapes, or could similar effects be observed in other animals? Thus far, evidence from an implicit matching experiment failed to find evidence of this sound symbolic matching in great apes, suggesting its human uniqueness. However, explicit tests of sound symbolism have never been conducted with nonhuman great apes. In the present study, a language-competent bonobo completed a cross-modal matching-to-sample task in which he was asked to match spoken English words to pictures, as well as ‘sharp’ or ‘round’ pseudowords to shapes. Sound symbolic trials were interspersed among English words. The bonobo matched English words to pictures with high accuracy, but did not show any evidence of spontaneous sound symbolic matching. Our results suggest that speech exposure/comprehension alone cannot explain sound symbolism. This lends plausibility to the hypothesis that biological differences between human and nonhuman primates could account for the putative human specificity of this effect.
Citation
Margiotoudi , K , Bohn , M , Schwob , N , Taglialatela , J , Pulvermüller , F , Epping , A , Schweller , K & Allritz , M 2022 , ' Bo-NO-bouba-kiki : picture-word mapping but no spontaneous sound symbolic speech-shape mapping in a language trained bonobo ' , Proceedings of the Royal Society of London Series B: Biological Sciences , vol. 289 , no. 1968 , 20211717 . https://doi.org/10.1098/rspb.2021.1717
Publication
Proceedings of the Royal Society of London Series B: Biological Sciences
Status
Peer reviewed
DOI
https://doi.org/10.1098/rspb.2021.1717
ISSN
0962-8452
Type
Journal article
Rights
Copyright © 2022 The Authors. Open Access. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Description
This work was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy through EXC 2025/1 ‘Matters of Activity (MoA)’ and by the ‘The Sound of Meaning (SOM)’, Pu 97/22–1 and ‘Phonological Networks (PhoNet)’, Pu 97/25-1. K.M. was supported by the Berlin School of Mind and Brain, by the Onassis foundation, and by the Fyssen foundation. M.A. was supported by the European Research Council under the European Union's Seventh Framework Program (FP7/2007-2013)/ERC grant agreement no. 609819, SOMICS.
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  • University of St Andrews Research
URL
https://doi.org/10.6084/m9.figshare.18737487.v1
URI
http://hdl.handle.net/10023/24821

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