Several current international comparative large-scale assessments of educational achievement (ICLSA) make use of "Rasch models", to address functions essential for valid cross-cultural comparisons. From a historical perspective, ICLSA and Georg Rasch's "models for measurement" emerged at about the same time, half a century ago. However, the…

This paper was prepared for school officials and researchers who plan to conduct an assessment of student writing but have limited field experience with this activity. The paper identifies twelve critical questions assessors should consider, and it explores issues involved in reaching a decision about each from the perspectives of measurement…