The basic method by which we determine equivalence between study and control groups in an ex post facto study is by
A) Matching
B) Definition
C) Induction
D) Random assignment

Question

Quizplus · Accepted Answer

In an ex post facto study, researchers do not have control over the assignment of participants. Therefore, the method of matching can be used to ensure that the study and control groups have equivalent characteristics, such as age, gender, and education level. This helps to minimize the effects of potential confounding variables and increase the internal validity of the study. Choice B (Definition) and C (Induction) are not applicable methods for determining equivalence in this type of study, and D (Random assignment) is not possible as the assignment has already occurred.

The Basic Method by Which We Determine Equivalence Between Study