What are the differences in vocabulary between the rich, middle income and poor of a 4 year old child? Key Points Research suggests that by age 4, children from high-SES (rich) families typically hear about 45 million words and have vocabularies around 1,100 words, middle-SES (working-class) hear 26 million with ~750 words, and low-SES (poor) … Continue reading What are the differences in vocabulary between the rich, middle income and poor of a 4 year old child?