Causal-comparative or ex post facto research is widely used because
A) such studies have greater internal validity than do quasi-experimental studies.
B) the law of the single significant independent variable can be more readily applied in ex post facto research than in experimental research.
C) it is not possible to experimentally manipulate many variables of interest .
D) Campbell and Stanley are exuberant in their praise of ex post facto research.

Question

Quizplus · Accepted Answer

Ex post facto research is used when it is not possible or ethical to manipulate the independent variable. Therefore, it is often used when studying variables such as gender, age, or previous experiences that cannot be changed or manipulated. This type of research can still provide valuable information despite the lack of experimental manipulation.

Causal-Comparative or Ex Post Facto Research Is Widely Used Because