Both the Polygraph and CVSA are scientifically-based tools used to assess truthfulness, but they operate in different ways:

• Polygraph testing measures physiological responses—such as heart rate, blood pressure, breathing, and skin conductivity—while the subject answers a series of structured questions. These physical responses can indicate stress associated with deception.

• CVSA (Computer Voice Stress Analysis), on the other hand, detects micro-changes in a person’s voice frequency that are triggered by psychological stress when being deceptive. The CVSA does not require any physical attachments and can be conducted in person, over the phone, or from recorded interviews, making it more versatile in certain scenarios.

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A landmark study by Professor James Chapman, which reviewed over 3,000 CVSA examinations over 18 years, found:

• Accuracy rate: 99.69%

• Precision rate: 99.67%

• Verified confession rate: 96.4%
  These results demonstrate CVSA's exceptional reliability as a decision-support tool in distinguishing truth from deception.

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Applications of Lie Detection Services

Our Truth Verification services are used in a wide range of sectors and situations, including:

Public Safety & Sensitive Employment

• Pre-employment background investigations for positions in law enforcement, including police officers, sheriffs, rangers, dispatchers, probation officers, and criminal investigators

• Candidates applying to security firms, armored transport, pharmaceutical companies, and others governed by the Employee Polygraph Protection Act (EPPA)

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Legal Community

• Used by defense attorneys, prosecutors, public defenders, and law enforcement agencies to support criminal investigations and exonerate the innocent

• Applied in civil litigation to support or challenge testimony

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Workplace Investigations

• Employers may request lie detector tests for employees suspected of involvement in workplace incidents resulting in economic loss or misconduct, especially where access to the compromised property was limited

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Family Law & Personal Matters

• Our Polygraph and CVSA services are also used in family law matters, including cases of suspected infidelity, disputes involving trust or child custody, and other domestic concerns. When emotions run high and the truth is in question, these tools offer an objective way to resolve disputes and restore clarity.

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At Maerly LLC, our Truth Verification exams are conducted by certified professionals with law enforcement or investigative backgrounds. Whether for employment screening, legal strategy, or personal clarity, we provide respectful, confidential, and accurate testing services to help you uncover the truth.