In conducting a randomized comparative experiment,an experimenter will often include a group of subjects,known as a control group,to receive a fake treatment.What is/are the reason(s)such a control group might be included in the experiment?
A)To increase the number of subjects and hence increase the sensitivity of the experiment in detecting effects of the treatment
B)To gain more complete understanding of any biases that might be present in the experiment
C)To enable the experimenter to control the effects of outside variables,such as lurking variables,on the outcome of the experiment
D)To repeat the experiment over a greater number of experimental subjects
E)To enable the experimenter to more easily make a random assignment of subjects to the groups

Question

Quizplus · Accepted Answer

By including a control group that receives a fake treatment, the experimenter can compare the outcomes of the treatment group to those of the control group, which enables them to control the effects of outside variables that might affect the outcome of the experiment. This provides a more accurate assessment of the treatment's effectiveness. The other choices are not accurate reasons for including a control group.

In Conducting a Randomized Comparative Experiment,an Experimenter Will Often Include