In order to apply the law of the single significant independent variable to a study, a researcher should
A) choose a single test for the dependent variable.
B) determine which single test is most related to the independent variable by using several tests as possible dependent variable.
C) determine which single variable makes the most difference by varying the independent variable in many different ways.
D) establish two groups that are as alike as possible, except one is exposed to the independent variable while the other is not.

Question

Quizplus · Accepted Answer

The law of the single significant independent variable states that there should only be one independent variable in a study, and that this variable should be the only variable that is varied systematically. The best way to apply this law is to establish two groups that are as alike as possible, except one is exposed to the independent variable while the other is not. This way, the researcher can determine the impact of the independent variable on the dependent variable while controlling for other variables that might affect the outcome.

In Order to Apply the Law of the Single Significant