A focus of the Common Core State Standards/English Language Arts (CCSS/ELA) is that students become increasingly more capable with complex text over their school careers. This focus has redirected attention to the measurement of text complexity. Although CCSS/ELA suggests multiple criteria for this task, the standards offer a single measure of…

This paper describes the Harris-Jacobson Readability Formula A, a revision of a readability formula based on word lists from "Basic Elementary Reading Vocabularies." Section one of the paper discusses procedures for using the formula, including the selection of samples, scoring the variables, and applying the formula. The next section…

This study examined the McCall-Crabbs Standard Test Lessons in Reading to determine whether selections of passages covered a sufficiently wide range of difficulty to warrant their use in developing readability formulas. The results, which find several readability formulas suspect, are discussed. (Author/MT)

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…

This article describes readability assessment methods used in science education, summarizes reported readability estimates of science textbooks, and recommends strategies for reducing the readability load of such materials. (JMF)

This paper describes and reports on the performance of six related artificial neural networks that have been developed for the purpose of readability analysis. Two networks employ counts of linguistic variables that simulate a traditional regression-based approach to readability. The remaining networks determine readability from "visual…

Presents a readability formula suitable for passages from 40 to 99 words (provided they contain at least 3 sentences). (RS)

Rescales DRP-Difficulty (Degrees of Reading Power) into grade equivalent (GE) units using the estimated difficulty level values obtained from the Rauding Scale. Finds the revised scale is accurate to within one graded level for lower grade materials and to within two grade levels for upper grade materials. (MM)

"Lasbarhetsindex" ("Lix") is a readability formula developed in Sweden that holds promise for assessing text difficulty in other languages, including English. So far three separate studies have been conducted to test Lix with French and English texts, with German and English texts, and with Greek and English texts. In all three…

Readability estimates are usually based on measures of word difficulty and measures of sentence difficulty. Word difficulty is measured in two ways: by the structural size and complexity of words or by reference to phonomena of language use, such as word-list frequency or the regularity of spelling patterns. Sentence difficulty is measured only in…

A previous report defined a series of 14 novel measures for determining the comprehensibility of English text on the basis of current psycholinguistic and Structure-of-Intellect concepts. That report not only suggested the potential usefulness of the measures but also conjectured about the feasibility of automating the calculation of these…

The papers included in this collection represent as closely as possible the content and organization of the oral presentations delivered at a March 1980 conference on the use of readability formulas. The papers discuss the following topics: (1) an introduction to the conference, with general remarks on the uses and criticism of readability…

The purpose of this book is to introduce the research on readability, defined here as reading ease. The first part of the book covers how people read. A series of national literacy surveys show that the average person in the U.S. and most other countries are adults of limited reading skills. For example, the average adult in the U.S. reads at the…

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…

Early in the 20th century, educators began looking for scientific methods for matching texts with readers. Some of the best minds in education dedicated themselves to this task, including Edward L. Thorndike, William S. Gray, Ralph Tyler, Edgar Dale, Irving Lorge, and Jeanne S. Chall. The purpose of this book is to bring students of reading into…