One way of providing some control in ex post facto research is
A) to use analysis of covariance.
B) to do a pilot study before carrying out the main research.
C) to match the subjects of the groups to be compared on as many extraneous variables as possible.
D) a and b
E) a and c

Question

Quizplus · Accepted Answer

Using both analysis of covariance and matching subjects on extraneous variables can help provide some control in ex post facto research. Doing a pilot study before carrying out the main research can also be helpful, but it is not as directly related to control as the other two options. Therefore, the best choice is E, which includes both options that directly address control in ex post facto research.

One Way of Providing Some Control in Ex Post Facto