Which of the following is a strength of a pretest-posttest control group design?
A) Pretests can be used to select and deselect participants before the actual treatment.
B) Confidentiality of the responses of the participants can be easily protected.
C) A considerable amount of the researcher's time and effort is saved.
D) Potential sensitizing effects pertaining to external validity can be eliminated.

Question

Quizplus · Accepted Answer

One strength of a pretest-posttest control group design is that pretests can be used to select and deselect participants before the actual treatment. This can help ensure that the groups are comparable in terms of the measured variable before the treatment. However, options B, C, and D are not strengths of this design. Option B is not necessarily true as confidentiality can be a concern regardless of the research design. Option C is not necessarily true as pretest-posttest designs can require a significant amount of work, particularly if multiple measures are used. Option D is not necessarily true as sensitizing effects can still occur, particularly if participants talk to each other or if there are other changes in the environment that occur between the pretest and posttest.

Which of the Following Is a Strength of a Pretest-Posttest