Having an elder brother is associated with slower language development

ScienceDaily | 9/5/2019 | Staff
smilingbearsmilingbear (Posted by) Level 4
What is even more surprising is that apparently only elder brothers impact the language skills of their younger siblings, as a study conducted by a research team from the CNRS, the AP-HP, the EHESS, the ENS and the INSERM has just shown. The study finds that children who have grown up with an elder sister have identical development to children with no elder sibling.

More than 1000 children have been followed from birth to five and a half years old in the mother-child cohort EDEN.* Their language skills were evaluated at 2, 3 and 5.5 years old by tests measuring several aspects of language, such as vocabulary, syntax and verbal reasoning. Children who have an elder brother had on average a two-month delay...
(Excerpt) Read more at: ScienceDaily
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