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Publications

Methodology

Performance Trajectories and Performance Gaps as Achievement Effect-Size Benchmarks for Educational Interventions

October, 2008

This MDRC working paper on research methodology explores two complementary approaches to developing empirical benchmarks for achievement effect sizes in educational interventions.

Methodology

Empirical Issues in the Design of Group-Randomized Studies to Measure the Effects of Interventions for Children

July, 2008

This MDRC working paper on research methodology provides practical guidance for researchers who are designing studies that randomize groups to measure the impacts of interventions on children.

Methodology

Using Covariates to Improve Precision

Empirical Guidance for Studies That Randomize Schools to Measure the Impacts of Educational Interventions

November, 2005

This paper examines how controlling statistically for baseline covariates (especially pretests) improves the precision of studies that randomize schools to measure the impacts of educational interventions on student achievement.

Methodology

Using Cluster Random Assignment to Measure Program Impacts

Statistical Implications for the Evaluation of Education Programs

August, 1999