Concept

The 30 Million Word Gap

A key finding from Hart and Risley's research is the '30 million word gap.' By age three, children from high-income families have been exposed to an estimated 30 million more words than their peers from low-income families. This significant disparity in language exposure also results in high-income toddlers possessing a vocabulary nearly twice the size of their low-income counterparts.

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Updated 2025-10-09

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