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Direct linkBrown, Seth; Song, Mengli; Cook, Thomas D.; Garet, Michael S. – American Educational Research Journal, 2023
This study examined bias reduction in the eight nonequivalent comparison group designs (NECGDs) that result from combining (a) choice of a local versus non-local comparison group, and analytic use or not of (b) a pretest measure of the study outcome and (c) a rich set of other covariates. Bias was estimated as the difference in causal estimate…
Descriptors: Research Design, Pretests Posttests, Computation, Bias
Haxton, Clarisse; Song, Mengli; Zeiser, Kristina; Berger, Andrea; Turk-Bicakci, Lori; Garet, Michael S.; Knudson, Joel; Hoshen, Gur – Educational Evaluation and Policy Analysis, 2016
This study is a randomized controlled trial that assessed the impact of Early College High Schools on students' high school graduation, college enrollment, and college degree attainment, as well as students' high school experiences using extant data and survey data. The study included 10 Early Colleges that enrolled students in Grades 9 to 12 in…
Descriptors: High Schools, Colleges, Dual Enrollment, Acceleration (Education)
