Nonparametric Gaps/Trends

Ho, A. D. (2009).  A nonparametric framework for comparing trends and gaps across tests. Journal of Educational and Behavioral Statistics. 34, 201-228.Website
Ho, A. D., & Reardon S. F. (In Press).  Estimating achievement gaps from test scores reported in ordinal "proficiency" categories. Journal of Educational and Behavioral Statistics. ho_reardon_jebs_final_revision.pdf
Furgol, K. E., Ho A. D., & Zimmerman D. L. (2010).  Estimating trends from censored assessment data under No Child Left Behind. Educational and Psychological Measurement. 70, 760-776.Website