L'étiologie génétique et environnementale de l'association entre le langage à l'enfance et l'écriture à l'adolescence : une étude de jumeaux

Authors: Aubé, Sophie
Advisor: Dionne, Ginette; Boivin, Michel
Abstract: The onset of oral language precedes that of written language. Many studies show that the former develops concurrently with the latter, and that oral language skills contribute to writing skills at various stages of development, from preschool to high school. Indeed, language skills are relatively stable over time and many components of oral language are intrinsic to writing tasks. Given the importance of writing for academic achievement, this study first aimed to understand if language skills at preschool contribute directly to writing in high school, or indirectly through primary school language and the language component of writing. The second aim of this study was to explore the extent to which genetic and environmental factors explain these potential associations. The sample (n = 620) is drawn from the Quebec Newborn Twin Study, a longitudinal follow-up of a cohort of twins born in the greater Montreal area. Language skills were measured when children were 1.5, 2.5, 6, 7, 10, and 12 years old, and writing skills were measured at 15 years old. Participants who completed the writing task in French were included in the study. Results showed that oral language was modestly associated with writing over a 12-year span, and that primary school language as well as the language component of writing were mediators of this association. Further, genes explained 63% of the association between preschool language and school age language, 64% of the association between school age language and the language component of writing in high school, and 83% of the association between the language component of writing and a residual writing score in high school. These results highlight the developmental continuity from oral to written language from preschool to high school and show that genetic factors largely account for this continuity.
Document Type: Mémoire de maîtrise
Issue Date: 2021
Open Access Date: 14 June 2021
Permalink: http://hdl.handle.net/20.500.11794/69376
Grantor: Université Laval
Collection:Thèses et mémoires

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