„Mothers with low levels of education and mothers in low-income households have been shown to provide their children with a less sensitive and less stimulating home learning environment. In addition, focusing on language stimulation behavior, findings showed that – for example – mothers with a high socio-economic status talked more to their children compared to lower SES (Anm.: socio-economic status) mothers. Further, differences according to the family’s SES were not only found for spontaneous speech and verbal communication but also with respect to the frequency and quality of joint book reading. […] Children living in low-income households have smaller vocabularies and more restricted language skills compared to their more advantaged peers.“
Dr. Manja Attig u. a., What Impacts Early Language Skills? Effects of Social Disparities and Different Process Characteristics of the Home Learning Environment in the First 2 Years (2020), S. 3.