Why are control groups included in experiments?
A) to determine whether two variables are related
B) to ascertain cause-and-effect relationships
C) to ensure that participant characteristics are essentially the same in each group
D) to ensure that the results may be generalized to the population

Question

Quizplus · Accepted Answer

Control groups are included in experiments primarily to ascertain cause-and-effect relationships by providing a baseline against which the effects of the experimental manipulation can be measured.

Why Are Control Groups Included in Experiments