One problem with the pretest-posttest design is that participants:
A)cannot be randomly assigned to groups.
B)are sensitized about the true purpose of the experiment.
C)drop out of the experiment.
D)cannot be divided into two equivalent groups.

Question

Quizplus · Accepted Answer

Participants may become sensitized to the true purpose of the experiment because they are given the pretest before the treatment, which may give them clues about what the experiment is testing. This could potentially affect their behavior and the results of the study.

One Problem with the Pretest-Posttest Design Is That Participants