In an experiment, more than one control condition is sometimes included so that the researcher can
A) rule out plausible alternatives to the hypothesized explanation for the effect of the independent variable.
B) completely test all components of a hypothesis.
C) create nonspecific treatment effects to supplement the effect of the independent variable.
D) do either a and b.

Question

Quizplus · Accepted Answer

Including multiple control conditions allows the researcher to rule out plausible alternatives to the hypothesized explanation for the effect of the independent variable (a) and to completely test all components of a hypothesis (b). Therefore, both options are valid reasons for including multiple control conditions.

In an Experiment, More Than One Control Condition Is Sometimes