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Quantifying Sources of Variability in Infancy Research Using the Infant-Directed Speech Preference

Research output: Contribution to journalJournal article

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Quantifying Sources of Variability in Infancy Research Using the Infant-Directed Speech Preference. / The Many Babies Consortium.

In: Advances in Methods and Practices in Psychological Science, Vol. 3, No. 1, 31.03.2020, p. 24-52.

Research output: Contribution to journalJournal article

Harvard

The Many Babies Consortium 2020, 'Quantifying Sources of Variability in Infancy Research Using the Infant-Directed Speech Preference', Advances in Methods and Practices in Psychological Science, vol. 3, no. 1, pp. 24-52. https://doi.org/10.1177/2515245919900809

APA

The Many Babies Consortium (2020). Quantifying Sources of Variability in Infancy Research Using the Infant-Directed Speech Preference. Advances in Methods and Practices in Psychological Science, 3(1), 24-52. https://doi.org/10.1177/2515245919900809

Vancouver

The Many Babies Consortium. Quantifying Sources of Variability in Infancy Research Using the Infant-Directed Speech Preference. Advances in Methods and Practices in Psychological Science. 2020 Mar 31;3(1):24-52. https://doi.org/10.1177/2515245919900809

Author

The Many Babies Consortium. / Quantifying Sources of Variability in Infancy Research Using the Infant-Directed Speech Preference. In: Advances in Methods and Practices in Psychological Science. 2020 ; Vol. 3, No. 1. pp. 24-52.

Bibtex

@article{5661bfb029164ab3855f93e5b4503a8a,
title = "Quantifying Sources of Variability in Infancy Research Using the Infant-Directed Speech Preference",
abstract = "Psychological scientists have become increasingly concerned with issues related to methodology and replicability, and infancy researchers in particular face specific challenges related to replicability: For example, high-powered studies are difficult to conduct, testing conditions vary across labs, and different labs have access to different infant populations. Addressing these concerns, we report on a large-scale, multisite study aimed at (a) assessing the overall replicability of a single theoretically important phenomenon and (b) examining methodological, cultural, and developmental moderators. We focus on infants{\textquoteright} preference for infant-directed speech (IDS) over adult-directed speech (ADS). Stimuli of mothers speaking to their infants and to an adult in North American English were created using seminaturalistic laboratory-based audio recordings. Infants{\textquoteright} relative preference for IDS and ADS was assessed across 67 laboratories in North America, Europe, Australia, and Asia using the three common methods for measuring infants{\textquoteright} discrimination (head-turn preference, central fixation, and eye tracking). The overall meta-analytic effect size (Cohen{\textquoteright}s d) was 0.35, 95% confidence interval = [0.29, 0.42], which was reliably above zero but smaller than the meta-analytic mean computed from previous literature (0.67). The IDS preference was significantly stronger in older children, in those children for whom the stimuli matched their native language and dialect, and in data from labs using the head-turn preference procedure. Together, these findings replicate the IDS preference but suggest that its magnitude is modulated by development, native-language experience, and testing procedure.",
keywords = "language acquisition, speech perception, infant-directed speech, reproducibility, experimental methods, open data, open materials, preregistered",
author = "{The Many Babies Consortium} and Didar Karadag",
note = "The final, definitive version of this article has been published in the Journal, Advances in Methods and Practices in Psychological Science, 3 (1), 2020, {\textcopyright} SAGE Publications Ltd, 2020 by SAGE Publications Ltd at the Social Psychological and Personality Science page: https://journals.sagepub.com/home/amp on SAGE Journals Online: http://journals.sagepub.com/",
year = "2020",
month = mar
day = "31",
doi = "10.1177/2515245919900809",
language = "English",
volume = "3",
pages = "24--52",
journal = "Advances in Methods and Practices in Psychological Science",
publisher = "Sage",
number = "1",

}

RIS

TY - JOUR

T1 - Quantifying Sources of Variability in Infancy Research Using the Infant-Directed Speech Preference

AU - The Many Babies Consortium

AU - Karadag, Didar

N1 - The final, definitive version of this article has been published in the Journal, Advances in Methods and Practices in Psychological Science, 3 (1), 2020, © SAGE Publications Ltd, 2020 by SAGE Publications Ltd at the Social Psychological and Personality Science page: https://journals.sagepub.com/home/amp on SAGE Journals Online: http://journals.sagepub.com/

PY - 2020/3/31

Y1 - 2020/3/31

N2 - Psychological scientists have become increasingly concerned with issues related to methodology and replicability, and infancy researchers in particular face specific challenges related to replicability: For example, high-powered studies are difficult to conduct, testing conditions vary across labs, and different labs have access to different infant populations. Addressing these concerns, we report on a large-scale, multisite study aimed at (a) assessing the overall replicability of a single theoretically important phenomenon and (b) examining methodological, cultural, and developmental moderators. We focus on infants’ preference for infant-directed speech (IDS) over adult-directed speech (ADS). Stimuli of mothers speaking to their infants and to an adult in North American English were created using seminaturalistic laboratory-based audio recordings. Infants’ relative preference for IDS and ADS was assessed across 67 laboratories in North America, Europe, Australia, and Asia using the three common methods for measuring infants’ discrimination (head-turn preference, central fixation, and eye tracking). The overall meta-analytic effect size (Cohen’s d) was 0.35, 95% confidence interval = [0.29, 0.42], which was reliably above zero but smaller than the meta-analytic mean computed from previous literature (0.67). The IDS preference was significantly stronger in older children, in those children for whom the stimuli matched their native language and dialect, and in data from labs using the head-turn preference procedure. Together, these findings replicate the IDS preference but suggest that its magnitude is modulated by development, native-language experience, and testing procedure.

AB - Psychological scientists have become increasingly concerned with issues related to methodology and replicability, and infancy researchers in particular face specific challenges related to replicability: For example, high-powered studies are difficult to conduct, testing conditions vary across labs, and different labs have access to different infant populations. Addressing these concerns, we report on a large-scale, multisite study aimed at (a) assessing the overall replicability of a single theoretically important phenomenon and (b) examining methodological, cultural, and developmental moderators. We focus on infants’ preference for infant-directed speech (IDS) over adult-directed speech (ADS). Stimuli of mothers speaking to their infants and to an adult in North American English were created using seminaturalistic laboratory-based audio recordings. Infants’ relative preference for IDS and ADS was assessed across 67 laboratories in North America, Europe, Australia, and Asia using the three common methods for measuring infants’ discrimination (head-turn preference, central fixation, and eye tracking). The overall meta-analytic effect size (Cohen’s d) was 0.35, 95% confidence interval = [0.29, 0.42], which was reliably above zero but smaller than the meta-analytic mean computed from previous literature (0.67). The IDS preference was significantly stronger in older children, in those children for whom the stimuli matched their native language and dialect, and in data from labs using the head-turn preference procedure. Together, these findings replicate the IDS preference but suggest that its magnitude is modulated by development, native-language experience, and testing procedure.

KW - language acquisition

KW - speech perception

KW - infant-directed speech

KW - reproducibility

KW - experimental methods

KW - open data

KW - open materials

KW - preregistered

U2 - 10.1177/2515245919900809

DO - 10.1177/2515245919900809

M3 - Journal article

VL - 3

SP - 24

EP - 52

JO - Advances in Methods and Practices in Psychological Science

JF - Advances in Methods and Practices in Psychological Science

IS - 1

ER -