Testing the Relationship Between Preferences for Infant-Directed Speech and Vocabulary Development: A Multi-Lab Study

Abstract

From early on, infants show a preference for infant-directed speech (IDS) over adult-directed speech (ADS), and exposure to IDS has been correlated with language outcome measures such as vocabulary. The present multi-laboratory study explores this issue by investigating whether there is a link between early preference for IDS and later vocabulary size. Infants’ preference for IDS was tested as part of the ManyBabies 1 project, and follow-up CDI data were collected from a subsample of this dataset at 18 and 24 months. A total of 341 (18 months) and 327 (24 months) infants were tested across 21 laboratories. In neither preregistered analyses with North American and UK English, nor exploratory analyses with a larger sample did we find evidence for a relation between IDS preference and later vocabulary. We discuss implications of this finding in light of recent work suggesting that IDS preference measured in the laboratory has low test-retest reliability.

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Item Type:	Article
Authors/Creators:	Soderstrom, M. Rocha-Hidalgo, J. Muñoz, L. E. Bochynska, A. Werker, J. F. Skarabela, B. Seidl, A. Ryjova, Y. Rennels, J. L. Potter, C. E. Paulus, M. Ota, M. Olesen, N. M. Nave, K. M. Mayor, J. Martin, A. Machon, L. C. Lew-Williams, C. Ko, E-S. Kim, H. Kartushina, N. Kammermeier, M. Jessop, A. Hay, J. F. Havron, N. Hannon, E. E. Hamlin, J. K. Gonzalez-Gomez, N. Gampe, A. Fritzsche, T. Frank, M. C. Durrant, S. Davies, C. https://orcid.org/0000-0001-9347-7905 Cashon, C. Byers-Heinlein, K. Boyce, V. Black, A. K. Bergmann, C. Anderson, L. AlShakhori, M. K. AL-Hoorie, A. H. Tsui, A. S. M.
Copyright, Publisher and Additional Information:	© The Author(s), 2024. Published by Cambridge University Press. This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial licence (http://creativecommons.org/licenses/by-nc/4.0), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original article is properly cited. The written permission of Cambridge University Press must be obtained prior to any commercial use.
Keywords:	infant-directed speech; vocabulary development
Dates:	Published (online): 18 October 2024 Accepted: 21 April 2024
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Arts, Humanities and Cultures (Leeds) > School of Languages Cultures & Societies (Leeds) > Linguistics & Phonetics (Leeds)
Depositing User:	Symplectic Publications
Date Deposited:	09 Aug 2024 10:16
Last Modified:	05 Nov 2024 13:54
Published Version:	https://www.cambridge.org/core/journals/journal-of...
Status:	Published online
Publisher:	Cambridge University Press
Identification Number:	10.1017/S0305000924000254
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:215898

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Testing the Relationship Between Preferences for Infant-Directed Speech and Vocabulary Development: A Multi-Lab Study

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