When selecting a textbook, college instructors must weigh a variety of factors. One is whether the text is written at a level that is accessible to one's students. An important factor in this is how many technical words are used. I developed an index to calculate logodiversity, a term I coined that reflects the number of technical words and the…

Issues pertaining to language and reading while developing and adapting tests are examined. Strengths and limitations associated with the use of readability formulas are discussed. Their use should be confined to paragraphs and longer passages, not items. Readability methods that consider both quantitative and qualitative variables and are…