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Gribbons, Barry1
Herman, Joan1
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Gribbons, Barry; Herman, Joan – 1997
Among the different types of experimental design are two general categories: true experimental designs and quasi- experimental designs. True experimental designs include more than one purposively created group, common measured outcomes, and random assignment. Quasi-experimental designs are commonly used when random assignment is not practical or…
Descriptors: Comparative Analysis, Control Groups, Evaluation Methods, Evaluation Utilization