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Creswell_Research_Design_ Qualitative Quantitative and Mixed Methods Approaches 2018 5th Ed

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Static Group Comparison or Posttest-Only With Nonequivalent Groups

Experimenters use this design after implementing a treatment. After the treatment, the researcher selects a comparison group and

provides a posttest to both the experimental group(s) and the comparison group(s).

Group A X______________________O

Group B _______________________O

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