To identify cause-and-effect relationships,it is usually necessary to exercise experimental control of variables.

Question

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Experimental control of variables allows researchers to manipulate the independent variable and observe the effects on the dependent variable, thus identifying cause-and-effect relationships. Without experimental control, it can be difficult to determine if changes in the dependent variable are truly caused by the independent variable or by other variables that were not controlled.

To Identify Cause-And-Effect Relationships,it Is Usually Necessary to Exercise Experimental