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The influence of sibship composition on language development at 2 years of age in the ELFE birth cohort study.

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Title: The influence of sibship composition on language development at 2 years of age in the ELFE birth cohort study.
Authors: Gurgand, Lilas (AUTHOR), Lamarque, Loïa (AUTHOR), Havron, Naomi (AUTHOR), Bernard, Jonathan Y. (AUTHOR), Ramus, Franck (AUTHOR), Peyre, Hugo (AUTHOR)
Source: Developmental Science. Jul2023, Vol. 26 Issue 4, p1-12. 12p.
Subjects: Siblings, Cohort analysis, Children's language, Cognitive ability, French language
Abstract: The number of older siblings a child has is negatively correlated with the child's verbal skills, an effect that is well known in the literature. However, few studies have examined the effect of older siblings' sex, of the age gap between siblings, of having foreign‐speaking parents, as well as the mediating role of parental interaction. Using data from 12,296 children (49.3% female) from the French ELFE birth cohort, we analyzed the effect of these characteristics of the siblings and their family on children's expressive vocabulary measured using the French MacArthur‐Bates Communicative Development Inventory. Children's vocabulary at age 2 years was negatively associated with the number of older siblings (−0.08 SD per additional sibling), and this effect was partly mediated by parental interactions. In analyses restricted to children with one older sibling, the vocabulary score was negatively correlated with the age gap between the target child and their older sibling. The vocabulary score was not correlated to their sibling's sex, contrary to the result of a previous study. In addition, the effect of the number of siblings was less negative in foreign speaking families that in French speaking families, suggesting that older siblings might partly compensate for the effect of having foreign‐speaking parents. Overall, our results are consistent with the resource dilution (stating that parents have limited resources to distribute among their children) and inconsistent with the confluence model (stating that a child's cognitive ability is correlated to the mean cognitive ability of the family). Research Highlights: Our results are consistent with the resource dilution model and inconsistent with the confluence modelThe negative effect of the number of siblings on expressive vocabulary is partly mediated by parental interactionsLarger age gaps between a child and their older sibling are associated with lower expressive vocabulary score [ABSTRACT FROM AUTHOR]
Copyright of Developmental Science is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: The influence of sibship composition on language development at 2 years of age in the ELFE birth cohort study.
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  Data: <searchLink fieldCode="AR" term="%22Gurgand%2C+Lilas%22">Gurgand, Lilas</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lamarque%2C+Loïa%22">Lamarque, Loïa</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Havron%2C+Naomi%22">Havron, Naomi</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bernard%2C+Jonathan+Y%2E%22">Bernard, Jonathan Y.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ramus%2C+Franck%22">Ramus, Franck</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Peyre%2C+Hugo%22">Peyre, Hugo</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Developmental+Science%22">Developmental Science</searchLink>. Jul2023, Vol. 26 Issue 4, p1-12. 12p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Siblings%22">Siblings</searchLink><br /><searchLink fieldCode="DE" term="%22Cohort+analysis%22">Cohort analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Children's+language%22">Children's language</searchLink><br /><searchLink fieldCode="DE" term="%22Cognitive+ability%22">Cognitive ability</searchLink><br /><searchLink fieldCode="DE" term="%22French+language%22">French language</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The number of older siblings a child has is negatively correlated with the child's verbal skills, an effect that is well known in the literature. However, few studies have examined the effect of older siblings' sex, of the age gap between siblings, of having foreign‐speaking parents, as well as the mediating role of parental interaction. Using data from 12,296 children (49.3% female) from the French ELFE birth cohort, we analyzed the effect of these characteristics of the siblings and their family on children's expressive vocabulary measured using the French MacArthur‐Bates Communicative Development Inventory. Children's vocabulary at age 2 years was negatively associated with the number of older siblings (−0.08 SD per additional sibling), and this effect was partly mediated by parental interactions. In analyses restricted to children with one older sibling, the vocabulary score was negatively correlated with the age gap between the target child and their older sibling. The vocabulary score was not correlated to their sibling's sex, contrary to the result of a previous study. In addition, the effect of the number of siblings was less negative in foreign speaking families that in French speaking families, suggesting that older siblings might partly compensate for the effect of having foreign‐speaking parents. Overall, our results are consistent with the resource dilution (stating that parents have limited resources to distribute among their children) and inconsistent with the confluence model (stating that a child's cognitive ability is correlated to the mean cognitive ability of the family). Research Highlights: Our results are consistent with the resource dilution model and inconsistent with the confluence modelThe negative effect of the number of siblings on expressive vocabulary is partly mediated by parental interactionsLarger age gaps between a child and their older sibling are associated with lower expressive vocabulary score [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Developmental Science is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/desc.13356
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        Text: English
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              Text: Jul2023
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