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To indirectly manipulate stress levels, researchers might require participants to prepare a public speech. To confirm this intervention worked, they use a manipulation check by measuring the intended construct through self-report questionnaires or physiological indicators, such as blood pressure. This step verifies that the participants actually experienced the intended level of stress.

Stress Manipulation Check

When researchers require participants to prepare a public speech to indirectly alter their anxiety, why do they subsequently measure physiological indicators like blood pressure or administer self-report questionnaires?

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