A researcher gives the experimental group gingko biloba and the control group a placebo. In this example, what the groups receive is the _____ variable.

Name: A researcher gives the experimental group gingko biloba and the control group a placebo. In this example, what the groups receive is the _____ variable.
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Question

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The variable being manipulated by the researcher (independent variable) is the type of substance given to each group (gingko biloba or placebo), therefore this is the independent variable.

A Researcher Gives the Experimental Group Gingko Biloba and the Control