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Creswell_Research_Design_ Qualitative Quantitative and Mixed Methods Approaches 2018 5th Ed

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Nonequivalent (Pretest and Posttest) Control-Group Design

In this design, a popular approach to quasi-experiments, the experimental Group A and the control Group B are selected without random

assignment. Both groups take a pretest and posttest. Only the experimental group receives the treatment.

Group A O————X————O

___________________________

Group B O—————————O

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