A researcher concludes that frustrating people by giving them a task that is impossible to complete causes them to behave more aggressively.Only ________ warrants this type of conclusion.

Question

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Experimental research is the only method that can establish causality between variables. In this case, the researcher manipulated the independent variable (frustrating task) and observed its effect on the dependent variable (aggressive behavior).

A Researcher Concludes That Frustrating People by Giving Them a Task