Teaching Fractions Example of a Pretest-Posttest Nonequivalent Groups Design

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Anti-Drug Program Example of a Pretest-Posttest Nonequivalent Groups Design

Differential History

Pretest-Posttest Design with Switching Replication

In a pretest-posttest nonequivalent groups design, how are the groups structured and assessed to evaluate the effect of an intervention?

A researcher is evaluating a new mindfulness program in two different schools using a pretest-posttest nonequivalent groups design. Match each component of the study with the logical function it serves in this design.

A researcher evaluates a new study-skills workshop by measuring the GPA of two existing student clubs in September and again in December. Only one club attends the workshop. If both clubs show a GPA increase, but the workshop club's increase is significantly greater, the researcher can use the non-workshop club's data to argue that the improvement was not caused simply by students becoming more acclimated to the semester over time.

Arrange the research steps of a pretest-posttest nonequivalent groups design in the correct order required to logically isolate a treatment effect from natural maturation.

In a pretest-posttest nonequivalent groups design, both the treatment group and the nonequivalent control group complete an initial baseline measurement before the intervention occurs.

In a study using a pretest-posttest nonequivalent groups design, why is it specifically useful to compare the pretest-to-posttest change in the treatment group against the pretest-to-posttest change in the control group?

A researcher using a pretest-posttest nonequivalent groups design finds that both the treatment group and the control group improved their scores by exactly 15 points. In evaluating these results, the researcher should _____ the conclusion that the treatment was uniquely responsible for the observed improvement.