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A physiological measure is an operational definition that involves recording a wide variety of biological processes within the body. Common examples in psychological research include assessing heart rate, blood pressure, galvanic skin response, hormone levels, or electrical activity and blood flow in the brain to quantify a variable.

Physiological Measure

Stress can be operationally defined using various physiological measures, beyond just self-report questionnaires. Researchers can quantify the stress response by recording specific biological variables within the body, such as elevated blood pressure levels or increased concentrations of the stress hormone cortisol.

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