Language and Marriage
An article (May 31st, 2007) in The Economist makes the point about the huge disparity in exposure to language between groups of people. The article is actually about the role of marriage in wealth maintenance and creation in different classes but has this aside about the impact of those differences on language exposure.
Research also suggests that middle- and working-class parents approach child-rearing in different ways. Professional parents shuttle their kids from choir practice to baseball camp and check that they are doing their homework. They also talk to them more. One study found that a college professor's kids hear an average of 2,150 words per hour in the first years of life. Working-class children hear 1,250 and those in welfare families only 620.