Reviews the literature and research on readability. Examines early formulas that relied on sentence length and difficulty of vocabulary, the subsequent use of cloze procedure to measure text readability, and other factors now recognized as influences on the comprehensibility of a text. Concludes that readability formulas have not served education…

Reviews formulas and related predictive devices that tell whether a particular piece of writing is likely to be readable to a particular group of readers. (RB)

There is a need for basic readability research and for an easily applied and accurate new readability formula. Two steps taken toward the development of such a formula are the revision of a vocabulary list for primary grades and the combination of reading exercises given at different grade levels into a single scale of ascending difficulty. Much…

The principles of readability are in every style manual. Readability formulas are in every writing aid. What is missing is the research and theory on which they stand. This short review of readability research spans 100 years. The first part covers the history of adult literacy studies in the U.S., establishing the stratified nature of the adult…

This literature review documents the state-of-the-art of readability assessment and indicates directions for future research in readability measurement. The period since 1953 is emphasized, although there is some consideration of earlier work. Primary emphasis within the review is based on readability measurement; however, a final section is…

Describes an adjustment factor which makes readability formulas more accurate. (RB)

Finding the right fit between students' reading ability and textbooks is very important for comprehension. Readability studies aim to analyse texts to find the right fit between students and texts. In this literature review, readability studies are classified under quantitative, qualitative and combined quantitative-qualitative readability…

After reviewing criticisms of the exclusive use of readability formulas to evaluate text difficulty and describing successful efforts to broaden the traditional readability formula approach, this report presents a 20 item checklist for determining text comprehensibility based on four criteria: (1) specific objectives or outcomes expected from the…