When we switch replications in a non-equivalent comparison group design, we:
A) administer the treatment to the control group before posttesting
B)can determine whether the difference between the groups at the first posttest may be attributed to the lack of comparability between the two groups.?
C)decrease the chances of determining whether the difference between the groups at the first posttest may be attributed to a selection bias.?
D) decrease the internal validity of the design.
B
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