One potential confounding factor in the simple pretest-posttest design, which the interrupted time-series designs controls for, is
A) regression to the mean.
B) experimenter bias.
C) the double-blind effect.
D) an order effect.
Question 2
Regression to the mean is a major potential confounding factor in which of the following?
A) posttest-only designs
B) pretest-posttest designs
C) all factorial designs
D) within-subjects designs