In the United States, there are numerous ongoing efforts to remedy the Word Gap
: massive differences in heardvocabulary
for poor versus advantaged children during the first 5 years of life. One potentially important resource for vocabulary
exposure is children's book reading
sessions, which are more lexically diverse than standard caregiver-child conversations and have demonstrated significant correlational and causal influences on children's vocabulary
development. Yet, nationally representative data suggest that around 25% of caregivers never read with their children.
This study uses data from 60 commonly read children's books to estimate the number of words that children are exposed to during book reading
sessions. We estimated the total cumulative word exposure for children who are read to at varying frequencies corresponding to nationally representative benchmarks across the first 5 years of life.
Parents who read 1 picture book with their children every day provide their children with exposure to an estimated 78,000 words each a year. Cumulatively, over the 5 years before kindergarten entry, we estimate that children from literacy
-rich homes hear a cumulative 1.4 million more words during storybook reading
than children who are never read to.
Home-based shared book reading
represents an important resource for closing the Word Gap