To provide a baseline against which they can evaluate the effects of a specific treatment,experimenters make use of a(n)

A) dependent variable.
B) independent variable.
C) control group.
D) experimental group.

Experimenters make use of a control group to provide a baseline for comparison against the effects of a specific treatment. The control group does not receive the treatment being tested, which allows the experimenter to determine if changes in the dependent variable are due to the treatment or other variables. The independent variable is the variable being manipulated by the experimenter, and the dependent variable is the variable that is being measured to determine the effects of the independent variable. The experimental group is the group that receives the treatment being tested.