Which of the following designs is an interpretable nonequivalent groups design?
A) The one-group posttest-only design
B) The pretest-posttest nonequivalent groups design with additional pretest
C) The posttest-only nonequivalent design comparing multiple active treatments
D) The one-group pretest-posttest design

Question

Quizplus · Accepted Answer

The pretest-posttest nonequivalent groups design with additional pretest is an interpretable nonequivalent groups design because it includes a pretest for both groups, allowing for a comparison of the groups' initial levels, and it also includes a posttest for both groups, allowing for a comparison of the groups' outcomes. The additional pretest strengthens the design by allowing for a better assessment of the groups' initial equivalence. The other designs listed do not have a control or comparison group and therefore do not allow for an interpretation of the treatment effect.

Which of the Following Designs Is an Interpretable Nonequivalent Groups