Mature neural responses to Infant-Directed Speech but not Adult-Directed Speech in Pre-Verbal Infants

Varghese Peter; Marina Kalashnikova; Aimee Santos; Denis Burnham

doi:10.1038/srep34273

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Mature neural responses to Infant-Directed Speech but not Adult-Directed Speech in Pre-Verbal Infants

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Mature neural responses to Infant-Directed Speech but not Adult-Directed Speech in Pre-Verbal Infants

Varghese Peter, Marina Kalashnikova, Aimee Santos and Denis Burnham

Scientific Reports, Vol.6(1), pp.1-14

2016

DOI: https://doi.org/10.1038/srep34273

PMCID: PMC5039709

PMID: 27677352

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Abstract

Developmental Psychology and Ageing

Linguistic Processes (incl. Speech Production and Comprehension)

infant directed speech

event related potentials

mismatch negativity

discrimination

Infant directed speech (IDS), the speech register adults use when talking to infants, has been shown to have positive effects on attracting infants' attention, language learning, and emotional communication. Here event related potentials (ERPs) are used to investigate the neural coding of IDS and ADS (adult directed speech) as well as their discrimination by both infants and adults. Two instances of the vowel /i/, one extracted from ADS and one from IDS, were presented to 9-month-old infants and adults in two oddball conditions: ADS standard/IDS deviant and IDS standard/ADS deviant. In Experiment 1 with adults, the obligatory ERPs that code acoustic information were different for ADS and IDS; and discrimination, indexed by mismatch negativity (MMN) responses, showed that IDS and ADS deviants were discriminated equally well; although, the P3a response was larger for IDS suggesting it captured adults' attention more than did ADS. In infants the obligatory responses did not differ for IDS and ADS, but for discrimination, while IDS deviants generated both a slow-positive mismatch response (MMR) as well as an adult-like MMN, the ADS deviants generated only an MMR. The presence of a mature adult-like MMN suggests that the IDS stimulus is easier to discriminate for infants.

Details

Title: Mature neural responses to Infant-Directed Speech but not Adult-Directed Speech in Pre-Verbal Infants
Authors: Varghese Peter (Author) - Western Sydney University
Marina Kalashnikova (Author) - Western Sydney University
Aimee Santos (Author) - Western Sydney University
Denis Burnham (Author) - Western Sydney University
Publication details: Scientific Reports, Vol.6(1), pp.1-14
Publisher: Nature Publishing Group
Date published: 2016
DOI: 10.1038/srep34273
ISSN: 2045-2322
PMID: 27677352; PMC5039709
Copyright note: © The Author(s) 2016. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Organisation Unit: School of Social Sciences - Legacy; University of the Sunshine Coast, Queensland; School of Health - Psychology; School of Health and Behavioural Sciences - Legacy
Language: English
Record Identifier: 99534307102621
Output Type: Journal article

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