Readability formulas may detract from textbook quality. They overlook text and reader characteristics that affect comprehension. Moreover, average "readability levels" ignore wide variations within texts and between scales. The shortened sentences and simplified vocabulary used to conform texts to formulas sacrifice precision and connectedness,…

"Writeability" is concerned with helping writers and editors produce materials on easier readability levels. A major input of most readability formulas is vocabulary difficulty. One way to increase readability is to use simple vocabulary or shorter words since word frequency studies show that more common words are shorter. The other…

The manual is intended to help writers or adapters of instructional materials for deaf students. The first section examines difficulties in providing suitable reading material for deaf students. The problems in evaluating deaf students' reading levels are examined. Writers are cautioned to pay particular attention to syntax, vocabulary, and…

Estimating readability requires more than a formula comparing word length and sentence length. Other factors to be considered include vocabulary, the relationship between syntax and readability, the syntax used in children's oral language, and writing style. Steps are outlined for systematically estimating readability of instructional materials…

Raises doubts about the validity of readability formulas. (RB)