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Download full textKim, Jee-Seon; Steiner, Peter M.; Hall, Courtney; Thoemmes, Felix – Society for Research on Educational Effectiveness, 2013
When randomized experiments cannot be conducted in practice, propensity score (PS) techniques for matching treated and control units are frequently used for estimating causal treatment effects from observational data. Despite the popularity of PS techniques, they are not yet well studied for matching multilevel data where selection into treatment…
Descriptors: Probability, Research Methodology, Control Groups, Experimental Groups
Raffeld, Paul; Reynolds, William M. – 1977
The pretest-posttest design referred to as Design 2 by Campbell and Stanley (1963) is commonly used in educational research and evaluation. The tenability of the assumption of a zero population difference commonly used with this design is questioned. A nonzero population estimate based on the mean difference observed in test-retest reliability…
Descriptors: Control Groups, Correlation, Experimental Groups, Hypothesis Testing
Burghardt, John; McConnell, Sheena; Meckstroth, Alicia; Schochet, Peter; Johnson, Terry; Homrighausen, John – 1999
The National Job Corps Study was conducted in 1994-1996 to provide a thorough and rigorous assessment of the impacts of the Job Corps on key participant outcomes. To ensure that the study was well implemented, a study team from Mathematica Policy Research, Inc., (MPR) investigated outcome and admission (OA) procedures in each Job Corps region and…
Descriptors: Admission Criteria, Career Education, Community Relations, Comparative Analysis
