Resources on readability

Websites, books and tools

Resources on readability

Learn to more about measuring and improving readability.

2003 National Assessment of Adult Literacy (PDF)

The U.S. Department of Education’s study is the most comprehensive, statistically reliable source on literacy in the United States. Also see the 1993 results.

Writing for Dollars, Writing to Please

Law professor Joseph Kimble’s treatise on legalese makes the case for plain language and includes dozens of case studies showing that plain language saves money and time and drives people to act more effectively than convoluted prose.

The Basics of Plain Language

William H. Dubay,,” Impact Information: Plain Language Services, 2005

The Principles of Readability (PDF)

Learn about U.S. literacy studies and research on readability and readability formulas from William H. Dubay, principal of Impact Information.

Smart Language (PDF)

William H. DuBay’s introduction to adult literacy surveys, research on readability and readability formulas.

Unlocking Language: The Classic Readability Studies (PDF)

Read the classics, the L.A. Sherman to the Flesch formulas, collected and curated by Impact Information’s William H. DuBay.

Working with Plain Language (PDF)

William H. DuBay’s introduction to the principles of plain language and guidelines for matching your text with the reading skill of the audience

Impact Information

Readability expert William H. DuBay’s blog

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