“talkative” parents heard an estimated 48 million words spoken, compared to the disadvantaged child, who heard only 13 million. The most important time for the children to hear the words, the research suggests, is the first year of life. Risley and Hart’s research followed the children they studied as they progressed through school. The number of words spoken to a child had a strong correlation between the number of words that they heard in their first thirty months and their performance on vocabulary and reading comprehension tests as they got older.
