In Schachter and Singer's classic experiment, participants were injected with epinephrine and then exposed to either an angry and hostile confederate, or an exuberantly happy confederate. Participants were then asked to describe their own emotional states. Which choice names and identifies a variable in this experiment?

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The independent variable in this experiment is the type of confederate, because it is being manipulated to see how it affects the participants' emotional states. The dependent variable is the participants' emotional states, which are being measured based on their self-reported descriptions. Control variables would be factors that are kept constant throughout the experiment, such as the dosage of epinephrine or the setting in which the experiment takes place. Experimental variable is not a commonly used term in psychology research.

In Schachter and Singer's Classic Experiment, Participants Were Injected with Epinephrine