The use of lie detectors, or polygraphs, during the hiring process is a controversial practice. Employers often view polygraphs as tools to assess honesty, integrity, and reliability in potential employees. However, legal restrictions, ethical concerns, and questions about accuracy make their use highly regulated and limited in many countries.
1. History of Polygraph Use
Origins
The modern polygraph was first developed in 1921 by psychologist Leonard Keeler in the United States. By the 1930s and 1940s, law enforcement agencies began using polygraphs to detect deception among suspects.
Polygraphs in Hiring
- 1950s–1960s (USA): Government agencies, particularly those dealing with classified information, began using polygraphs as part of security clearance and hiring processes.
- 1970s–1980s: Some private companies, especially in finance, security, and transportation, began using polygraphs to screen potential employees.
- Other countries: Polygraph use remained limited, mostly within government or security-related organizations.
Example: Agencies such as the CIA and FBI in the United States routinely use polygraph tests for positions involving national security or access to sensitive information.
2. How Polygraphs Are Used in Hiring
A polygraph measures physiological responses—heart rate, blood pressure, respiration, and sweat gland activity—while the candidate answers questions. The idea is that deceptive answers may produce measurable stress responses.
Typical Process:
- Candidates answer baseline or control questions to measure normal physiological responses.
- Candidates are asked job-relevant questions about honesty, prior criminal behavior, or adherence to company policies.
- A trained examiner analyzes the physiological responses to detect inconsistencies.
Examples of Use:
- Banking and finance: Screening for employees handling money or sensitive financial data.
- Security and law enforcement: Screening for potential dishonesty, misconduct, or risk of leaking confidential information.
- Government agencies: Screening for security clearance positions or access to classified materials.
3. Legal Considerations
International Regulations
- United States: The Employee Polygraph Protection Act (EPPA, 1988) generally prohibits private employers from using polygraphs for pre-employment screening, with exceptions for government agencies and security-sensitive industries.
- European Union: Most EU countries restrict or prohibit polygraph use in hiring due to privacy and personal data protection concerns.
Russia
- Polygraph use is not explicitly banned, but there are restrictions:
- Employees cannot be forced to take a polygraph as a condition of employment.
- Using polygraph results to discriminate or collect personal data without consent may violate labor laws and data protection legislation.
Legal Practice: Polygraph results can be considered supplementary information but cannot serve as the sole basis for employment decisions.
4. Ethical and Practical Concerns
- Privacy: Polygraph results are personal and sensitive; candidates have the right to access their results.
- Accuracy: Polygraphs are not 100% reliable. Stress, anxiety, or medical conditions can produce false positives.
- Consent: Mandatory polygraph testing without consent may violate ethical norms and legal protections.
- Discrimination risk: Using polygraphs selectively or against certain groups can lead to legal liability.
5. Modern Trends
- Many multinational companies avoid mandatory polygraph testing due to legal risks and questionable reliability.
- Alternative screening methods are preferred:
- Structured competency-based interviews
- Reference and background checks
- Skill and aptitude assessments
- Psychological evaluations without polygraphs
Example: Major banks and IT firms often rely on comprehensive background checks and behavioral interviews rather than polygraphs to assess employee integrity.
Conclusion
- Lie detectors have a long history, primarily in law enforcement and government security.
- In hiring, polygraphs are limited to sensitive roles where security or confidentiality is critical.
- Modern legislation in most countries either strictly regulates polygraph use (e.g., USA, EU) or allows it only with candidate consent (e.g., Russia).
- Polygraphs cannot legally replace standard hiring procedures and should be used cautiously, primarily as supplementary information.
Key Takeaway: Using a polygraph in hiring is generally heavily regulated and often restricted, and reliance solely on polygraph results is legally and ethically problematic. Employers should consider alternative, legally compliant methods for assessing candidate integrity and reliability.