Which of the following is an advantage of before-after designs?
A) Participants experience less fatigue.
B) Participants are less likely to guess the research hypothesis.
C) Random error is reduced.
D) Statistical power is decreased.

Question

Quizplus · Accepted Answer

Before-after designs, also known as pretest-posttest designs, reduce random error by comparing the same group of participants before and after an intervention, thus controlling for inter-individual variability.

Which of the Following Is an Advantage of Before-After Designs