The failure of readability formulas can be attributed to three weaknesses in the formulas. First, they ignore or violate current knowledge about the reading process. Most formulas affect only sentence length and word difficulty while ignoring factors that influence text comprehensibility, such as cohesion, the number of inferences required, the…

A study examined the match between the vocabularies of children of different ethnic and socioeconomic status groups and the school vocabulary revealed by readability formulas and word lists. The Spache 1040 and the Dale 769 readability formula word lists were used as indicators of school vocabulary in the early primary grades, and a corpus of talk…