Which of the following is the reason that ex post facto control group design should be considered nonexperimental rather than quasi-experimental?
A) It does not employ random assignment to the experimental and comparison groups.
B) It lacks a posttest.
C) It lacks internal validity.
D) The comparison group is designated only after the intervention has occurred.

Question

Quizplus · Accepted Answer

In ex post facto designs, the comparison group is identified after the intervention, which means there is no manipulation or control over the assignment to groups, making it nonexperimental.

Which of the Following Is the Reason That Ex Post