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  Acoustic regularities in infant-directed speech and song across cultures

Hilton, C. B., Moser, C. J., Bertolo, M., Lee-Rubin, H., Amir, D., Bainbridge, C. M., et al. (2022). Acoustic regularities in infant-directed speech and song across cultures. Nature Human Behaviour. doi:10.1038/s41562-022-01410-x.

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 Creators:
Hilton, Courtney B., Author
Moser, Cody J., Author
Bertolo, Mila, Author
Lee-Rubin, Harry, Author
Amir, Dorsa, Author
Bainbridge, Constance M., Author
Simson, Jan, Author
Knox, Dean, Author
Glowacki, Luke, Author
Alemu, Elias, Author
Galbarczyk, Andrzej, Author
Jasienska, Grazyna, Author
Ross, Cody T.1, Author                 
Neff, Mary Beth, Author
Martin, Alia, Author
Cirelli, Laura K., Author
Trehub, Sandra E., Author
Song, Jinqi, Author
Kim, Minju, Author
Schachner, Adena, Author
more..
Affiliations:
1Department of Human Behavior Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_2173689              
2Linguistic and Cultural Evolution, Max Planck Institute for the Science of Human History, Max Planck Society, ou_2074311              

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 Abstract: When interacting with infants, humans often alter their speech and song in ways thought to support communication. Theories of human child-rearing, informed by data on vocal signalling across species, predict that such alterations should appear globally. Here, we show acoustic differences between infant-directed and adult-directed vocalizations across cultures. We collected 1,615 recordings of infant- and adult-directed speech and song produced by 410 people in 21 urban, rural and small-scale societies. Infant-directedness was reliably classified from acoustic features only, with acoustic profiles of infant-directedness differing across language and music but in consistent fashions. We then studied listener sensitivity to these acoustic features. We played the recordings to 51,065 people from 187 countries, recruited via an English-language website, who guessed whether each vocalization was infant-directed. Their intuitions were more accurate than chance, predictable in part by common sets of acoustic features and robust to the effects of linguistic relatedness between vocalizer and listener. These findings inform hypotheses of the psychological functions and evolution of human communication.

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Language(s): eng - English
 Dates: 2022-07-18
 Publication Status: Published online
 Pages: 20
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/s41562-022-01410-x
 Degree: -

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Title: Nature Human Behaviour
Source Genre: Journal
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISBN: 2397-3374