Modeling Change in Large-Scale Longitudinal Studies of Educational Growth: Four Decades of Contributions to the Assessment of Educational Growth

Abstract

This chapter provides a history of ETS’s role in developing assessment instruments and psychometric procedures for measuring change in large-scale national assessments funded by the Longitudinal Studies branch of the National Center for Education Statistics. The chapter documents the innovations developed over more than 30 years of conducting longitudinal studies based on national samples. In addition to describing these innovations, it provides their rationale and presents relevant empirical results.