A survey of the current research on readability formulas is presented in this paper, which distinguishes this research from research on the more general questions that surround formulas: What features of a text, particularly the language it is written in, make the text easy or difficult to read? and, What will predict that readers with particular…

The problems arising from treating word and sentence complexity as the direct causes of difficulty in comprehension are surveyed in this paper from the perspective of readability formulas. The basic choices and assumptions made in the development and use of readability formulas are discussed in relation to the larger question of text…