The independent variable in an experimental design, or what the researcher is alleging to cause a change in the dependent variable, is also known as the:

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The treatment is the independent variable in an experimental design, as it is the variable that is being manipulated to see if it causes a change in the dependent variable. The control refers to the group or condition that does not receive the treatment, the effect is the change in the dependent variable that is being measured, and a pre-test is a measurement taken before the treatment is administered.

The Independent Variable in an Experimental Design, or What the Researcher