In a nonequivalent before-after design, we compare:

Question

Quizplus · Accepted Answer

In a nonequivalent before-after design, we cannot make valid comparisons between the pretest scores of the experimental and control groups because they are not equivalent to begin with. Instead, we look at the change in scores from pretest to posttest for both the experimental and control groups. This allows us to see if there was a significant change in scores for the experimental group, compared to the control group. Therefore, the best choice is D.

In a Nonequivalent Before-After Design, We Compare