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The developmental origins of genetic factors influencing language and literacy: Associations with early-childhood vocabulary / E. VERHOEF in Journal of Child Psychology and Psychiatry, 62-6 (June 2021)
[article]
Titre : The developmental origins of genetic factors influencing language and literacy: Associations with early-childhood vocabulary Type de document : Texte imprimé et/ou numérique Auteurs : E. VERHOEF, Auteur ; C. Y. SHAPLAND, Auteur ; S. E. FISHER, Auteur ; Philip S. DALE, Auteur ; B. ST POURCAIN, Auteur Article en page(s) : p.728-738 Langues : Anglais (eng) Mots-clés : Adolescent Child Humans Language Language Development Literacy Longitudinal Studies Vocabulary Alspac behavioural genetics language and literacy development Index. décimale : PER Périodiques Résumé : BACKGROUND: The heritability of language and literacy skills increases from early-childhood to adolescence. The underlying mechanisms are little understood and may involve (a) the amplification of genetic influences contributing to early language abilities, and/or (b) the emergence of novel genetic factors (innovation). Here, we investigate the developmental origins of genetic factors influencing mid-childhood/early-adolescent language and literacy. We evaluate evidence for the amplification of early-childhood genetic factors for vocabulary, in addition to genetic innovation processes. METHODS: Expressive and receptive vocabulary scores at 38 months, thirteen language- and literacy-related abilities and nonverbal cognition (7-13 years) were assessed in unrelated children from the Avon Longitudinal Study of Parents and Children (ALSPAC, N(individuals) ? 6,092). We investigated the multivariate genetic architecture underlying early-childhood expressive and receptive vocabulary, and each of 14 mid-childhood/early-adolescent language, literacy or cognitive skills with trivariate structural equation (Cholesky) models as captured by genome-wide genetic relationship matrices. The individual path coefficients of the resulting structural models were finally meta-analysed to evaluate evidence for overarching patterns. RESULTS: We observed little support for the emergence of novel genetic sources for language, literacy or cognitive abilities during mid-childhood or early adolescence. Instead, genetic factors of early-childhood vocabulary, especially those unique to receptive skills, were amplified and represented the majority of genetic variance underlying many of these later complex skills (?99%). The most predictive early genetic factor accounted for 29.4%(SE = 12.9%) to 45.1%(SE = 7.6%) of the phenotypic variation in verbal intelligence and literacy skills, but also for 25.7%(SE = 6.4%) in performance intelligence, while explaining only a fraction of the phenotypic variation in receptive vocabulary (3.9%(SE = 1.8%)). CONCLUSIONS: Genetic factors contributing to many complex skills during mid-childhood and early adolescence, including literacy, verbal cognition and nonverbal cognition, originate developmentally in early-childhood and are captured by receptive vocabulary. This suggests developmental genetic stability and overarching aetiological mechanisms. En ligne : http://dx.doi.org/10.1111/jcpp.13327 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=456
in Journal of Child Psychology and Psychiatry > 62-6 (June 2021) . - p.728-738[article] The developmental origins of genetic factors influencing language and literacy: Associations with early-childhood vocabulary [Texte imprimé et/ou numérique] / E. VERHOEF, Auteur ; C. Y. SHAPLAND, Auteur ; S. E. FISHER, Auteur ; Philip S. DALE, Auteur ; B. ST POURCAIN, Auteur . - p.728-738.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 62-6 (June 2021) . - p.728-738
Mots-clés : Adolescent Child Humans Language Language Development Literacy Longitudinal Studies Vocabulary Alspac behavioural genetics language and literacy development Index. décimale : PER Périodiques Résumé : BACKGROUND: The heritability of language and literacy skills increases from early-childhood to adolescence. The underlying mechanisms are little understood and may involve (a) the amplification of genetic influences contributing to early language abilities, and/or (b) the emergence of novel genetic factors (innovation). Here, we investigate the developmental origins of genetic factors influencing mid-childhood/early-adolescent language and literacy. We evaluate evidence for the amplification of early-childhood genetic factors for vocabulary, in addition to genetic innovation processes. METHODS: Expressive and receptive vocabulary scores at 38 months, thirteen language- and literacy-related abilities and nonverbal cognition (7-13 years) were assessed in unrelated children from the Avon Longitudinal Study of Parents and Children (ALSPAC, N(individuals) ? 6,092). We investigated the multivariate genetic architecture underlying early-childhood expressive and receptive vocabulary, and each of 14 mid-childhood/early-adolescent language, literacy or cognitive skills with trivariate structural equation (Cholesky) models as captured by genome-wide genetic relationship matrices. The individual path coefficients of the resulting structural models were finally meta-analysed to evaluate evidence for overarching patterns. RESULTS: We observed little support for the emergence of novel genetic sources for language, literacy or cognitive abilities during mid-childhood or early adolescence. Instead, genetic factors of early-childhood vocabulary, especially those unique to receptive skills, were amplified and represented the majority of genetic variance underlying many of these later complex skills (?99%). The most predictive early genetic factor accounted for 29.4%(SE = 12.9%) to 45.1%(SE = 7.6%) of the phenotypic variation in verbal intelligence and literacy skills, but also for 25.7%(SE = 6.4%) in performance intelligence, while explaining only a fraction of the phenotypic variation in receptive vocabulary (3.9%(SE = 1.8%)). CONCLUSIONS: Genetic factors contributing to many complex skills during mid-childhood and early adolescence, including literacy, verbal cognition and nonverbal cognition, originate developmentally in early-childhood and are captured by receptive vocabulary. This suggests developmental genetic stability and overarching aetiological mechanisms. En ligne : http://dx.doi.org/10.1111/jcpp.13327 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=456