Multiple Choice
When a pretest and posttest are used on all subjects in the experimental and control groups
A) the pretest may influence posttest results.
B) the experimenter knows whether it is reasonable to assume that both groups began at a similar point.
C) there may be interaction between pretest and treatment effects.
D) a and b
E) a, b, and c
Correct Answer:
Verified
Correct Answer:
Verified
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