A researcher studying hand washing uses guidelines set by the Department of Health to determine if hand washing has taken place: use warm or hot running water and soap while washing for 10 to 15 seconds all surfaces, including wrists, palms, backs of hands, and under fingernails.This guideline is considered

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The guideline provided by the Department of Health is an operational definition because it defines the specific actions that need to be taken in order to meet the criteria for "hand washing."

A Researcher Studying Hand Washing Uses Guidelines Set by the Department