The one-group pretest-posttest design is best used when
A) the characteristic that constitutes the dependent variable is relatively stable.
B) the experimental treatment extends over a relatively long period.
C) history may function as an extraneous variable.
D) the control group has not been randomly selected.

Question

Quizplus · Accepted Answer

The one-group pretest-posttest design is most effective when the dependent variable is relatively stable, ensuring that changes observed can more confidently be attributed to the intervention rather than fluctuations in the variable itself.

The One-Group Pretest-Posttest Design Is Best Used When