Which of the following is a weakness of a posttest-only control group design?
A) Researchers have limited information available about group equivalence prior to treatment.
B) It is expensive to the researcher in terms of time and effort.
C) Confidentiality of the responses is compromised as the participants are unable to respond anonymously.
D) Repeated testing may be occasionally bothersome to some participants.

Question

Quizplus · Accepted Answer

In a posttest-only control group design, researchers have limited information about the equivalence of the groups before the treatment is administered. This can limit the ability to draw strong conclusions about the treatment effect.

Which of the Following Is a Weakness of a Posttest-Only