In order to isolate the cause of a change, the researcher must be controlling the variation in the independent variable and not allowing it to vary on its own.

Question

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This statement is true. Controlling the variation in the independent variable allows the researcher to confidently attribute any observed changes in the dependent variable to the manipulation of the independent variable, rather than to other factors that may be occurring naturally.

In Order to Isolate the Cause of a Change, the Researcher