The pretest-posttest nonequivalent groups design is a stronger and more interpretable design than the posttest-only nonequivalent groups design because it allows for an examination of:
A) some of the posttreatment differences.
B) the results of the posttreatment analysis.
C) some of the pretreatment differences.
D) the results of the pretreatment analysis.

Question

Quizplus · Accepted Answer

The pretest-posttest nonequivalent groups design allows for an examination of some of the pretreatment differences between the groups, which can help control for selection bias and increase the internal validity of the study. The posttreatment differences can also be examined, but this is not the main advantage of this design over the posttest-only nonequivalent groups design.

The Pretest-Posttest Nonequivalent Groups Design Is a Stronger and More