The research experiment is superior to the ex post facto research design when the researcher:
A) Must avoid influencing the variables under study and therefore avoid biasing the results.
B) Needs to cause variables to be changed or held constant in keeping with specified research objectives.
C) Is limited to hold all factors constant by selection of subjects according to strict sampling procedures and statistical manipulation of findings.
D) Decides to use the design more common to research in the social sciences and business.

Question

Quizplus · Accepted Answer

The ex post facto research design is used when the researcher cannot actively manipulate variables and must study them as they naturally occur. However, the research experiment is superior when the researcher needs to cause variables to be changed or held constant in order to meet specific research objectives. Therefore, option B is the best choice. Option A is incorrect because the research experiment can still be biased if the variables are not controlled properly. Option C is incorrect because sampling procedures and statistical manipulation are applicable to both research experiment and ex post facto designs. Option D is incorrect because choosing a design based on popularity is not a valid reason.

The Research Experiment Is Superior to the Ex Post Facto