Measures of Linguistic Accuracy in Second Language Writing Research

Because a literature review revealed that the descriptions of measures of linguistic accuracy in research on second language writing are often inadequate and their reliabilities often not reported, I completed an empirical study comparing 3 measures. The study used a holistic scale, error‐free T‐units, and an error classification system on the essays of English as a second language (ESL) students. I present detailed discussion of how each measure was implemented, give intra‐ and interrater reliabilities and discuss why disagreements arose within a rater and between raters. The study will provide others doing research in the area of L2 writing with a comprehensive description that will help them select and use a measure of linguistic accuracy.