Second language development in writing: Measures of fluency, accuracy, and complexity is a technical report that reviews 39 studies examining measures of writing development. It is a comprehensive, lucid, and carefully researched piece of work analyzing an untidy body of literature. This volume is essential reading for anyone doing quantitative research in L2 writing. The studies included in this review are those that have attempted to correlate potential linguistic measures of writing development with writing proficiency, not simply studies that have used the various measures as dependent variables to examine the effects of some instructional treatment. Complicating the picture is the fact that indicators of writing proficiency are varied, as is the case with indicators of oral proficiency (Thomas, 1994). Each of these indicators, including standardized tests, levels in various language programs, and holistic measures, has its own set of problems. For example, of the 16 studies using holistic scales, only half reported interrater or intrarater reliability.