Multiple Choice
Which of the following statements about control groups is TRUE?
A) Control groups help eliminate time-related confounds as alternative explanations for research results.
B) Control groups are not needed when the research uses a pretest-posttest design.
C) Selection as a threat to internal validity is not an issue when the study includes a control group.
D) The use of a pretest requires that an additional control group be added.
Correct Answer:
Verified
Correct Answer:
Verified
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