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Professionals with this skill conduct interviews to verify the truthfulness of individuals, often used in legal, security, or employment settings. They use specialized equipment to monitor and record physical responses such as heart rate, breathing, and skin activity while asking targeted questions. They analyze these responses to help determine whether someone is being honest or deceptive. Their findings support decision-making in investigations, hiring processes, or legal proceedings. They prepare clear, factual reports that can be understood by non-specialists, including law enforcement, attorneys, or human resources teams.