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Megan E. Patrick; Richard A. Miech; Lloyd D. Johnston; Patrick M. O’Malley – Institute for Social Research, 2024
Monitoring the Future (MTF) is an ongoing research program conducted at the University of Michigan's Institute for Social Research under a series of investigator-initiated research grants from the National Institute on Drug Abuse beginning in 1975. The integrated MTF study includes annual surveys of nationally-representative samples of 8th, 10th,…
Descriptors: Drug Abuse, Substance Abuse, Adults, Young Adults
Bloom, Howard S.; Richburg-Hayes, Lashawn; Black, Alison Rebeck – MDRC, 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. Part I of the paper introduces the concepts, issues, and options involved. Parts II and III present empirical findings…
Descriptors: Program Effectiveness, Reading Achievement, Mathematics Achievement, Research Methodology