When We Switch Replications in a Non-Equivalent Comparison Group Design

question 19

Multiple Choice

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.​