Which of the following is NOT true of control variables?
A)They help define the control group.
B)They help establish internal validity.
C)They are essential in experimental designs.
D)They are kept the same for all participants.

Question

Quizplus · Accepted Answer

Control variables may be used to define the treatment group, but they are not used to define the control group. The control group is defined by the absence of the treatment or intervention being studied.

Which of the Following Is NOT True of Control Variables