„On average, parents with a comparatively higher SES (Anm.: SES = socioeconomic status) present their children with a richer language-stimulating environment by talking more, using more different words, more complex and varied sentence structures, as well as a larger proportion of conversation-eliciting questions in comparison to lower SES parents. Furthermore, differences in joint picture book reading as well as in sensitive and stimulating parent–child interactions have been documented. As a result, children from high-SES families develop language at a faster rate compared to children from low-SES families. Parental education is considered to be the component of SES that is most closely linked to child vocabulary.“
Dr. Anna Volodina u. a., Explaining gaps by parental education in children’s early language and social outcomes at age 3–4 years: evidence from harmonised data from three countries (2022), S. 2f.