About this paper
Value-added modeling for educational evaluation is currently receiving considerable attention, with a number of different value-added models (VAMs) being proposed. Two relatively recent additions to the VAM pantheon use nonparametric analyses that make fewer assumptions: the standardized gain model (SGM) and the student growth percentile model (SGPM). This paper, written by S. Paul Wright of SAS, investigates these two models, comparing them to some alternative models when applied to actual student test data, and discusses the results of the comparisons.
SAS is the leader in analytics. Through innovative analytics, business intelligence and data management software and services, SAS helps customers at more than 83,000 sites make better decisions faster. Since 1976, SAS has been giving customers around the world THE POWER TO KNOW®.