Vertical scales are frequently developed using common item nonequivalent group linking. In this design, one can use upper-grade, lower-grade, or mixed-grade common items to estimate the linking constants that underlie the absolute measurement of growth. Using the Rasch model and a dataset from Curriculum Associates' i-Ready Diagnostic in math in…

This article discusses the range of validation studies conducted in Kansas in examining the validity of the National Teachers' Examination as a certification test for that state. It is argued that the validation of certification tests calls for a wider range of studies than typically are undertaken. (JAZ)

Explores the relationship between measurement theory and practice, considering five broad categories of: (1) models, assumptions, and terminology; (2) reliability; (3) validity; (4) scaling; and (5) setting performance standards. It must be recognized that measurement is not an end in itself. (SLD)

The scales of the National Assessment of Educational Progress (NAEP), as constructed, do not yield meaningful criterion-referenced interpretations. Poorly defined NAEP goals and the present knowledge base do not allow the measurement of what examinees can and cannot do. Inappropriate interpretations of NAEP data are discussed, with specific…