Dr.Smith conducts an experiment on motivation.His experimental group is administered the independent variable.His control group is not.Dr.Smith hires Jack to act as a research subject who has little motivation despite the encouragement provided to him during the experiment.Dr.Smith wants to see how Jack's behavior affects the motivation of the actual research subjects in the experimental group.In this experiment,Jack is serving as

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Jack is serving as a confederate, meaning he is playing a role in the experiment to manipulate the behavior of the actual research subjects. He is not the independent variable, as that is being administered to the experimental group. He is also not the dependent variable, as his behavior is not being measured or observed.

DrSmith Conducts an Experiment on Motivation