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Xu, Zeyu; Nichols, Austin – National Center for Analysis of Longitudinal Data in Education Research, 2010
The gold standard in making causal inference on program effects is a randomized trial. Most randomization designs in education randomize classrooms or schools rather than individual students. Such "clustered randomization" designs have one principal drawback: They tend to have limited statistical power or precision. This study aims to…
Descriptors: Test Format, Reading Tests, Norm Referenced Tests, Research Design
Peer reviewed Peer reviewed
Fitz, Don; Tryon, Warren W. – Evaluation and Program Planning, 1989
Methods of using simplified time series analysis (STSA) in evaluating clinical programs are discussed. STSA assists in addressing problems of attrition/augmentation of subjects in programs with changing populations. Combining individually calculated "C" statistics in a simple aggregate analysis of restraint usage by nursing home staff…
Descriptors: Attrition (Research Studies), Clinics, Evaluation Problems, Experimental Groups
Clark, Sheldon B.; And Others – 1991
Suggestions, based on the experience of researchers at Oak Ridge (Tennessee) Associated Universities (ORAU), are offered on how evaluations in which true experimental designs are not possible can be designed for meaningful comparison. The ORAU conducts evaluation and assessment studies of educational programs intended to explore some aspect of the…
Descriptors: Case Studies, Comparative Analysis, Control Groups, Databases