When Two Groups Are Compared in Impact Program Evaluation, One

Multiple Choice

When two groups are compared in impact program evaluation, one of the following is NOT correct:

A) one group serves as the experimental group and the other serves as the comparison group.
B) a single group serves as the experimental group and also serves as the comparison group.
C) all groups are tested at the end of the program and the scores added and divided by the number of participants.
D) a counterfactual is evidence of what would have happened to participants if they were not in the program.