Even though the one-group pretest-posttest design is inadequate, it has one methodological advantage over the one-group posttest-only design, and that is
A) the use of randomization.
B) external validity.
C) pretest scores can be compared to posttest scores.
D) statistical tests are available to use with that design.

Question

Quizplus · Accepted Answer

The one-group pretest-posttest design allows for the comparison of pretest scores to posttest scores, enabling researchers to observe changes over time within the same group. This is a methodological advantage it has over the one-group posttest-only design, which does not include a pretest measurement for comparison.

Even Though the One-Group Pretest-Posttest Design Is Inadequate, It Has