Which Act generally prevents employers from using lie detector tests, either for pre-employment screening or during the course of employment, with certain exemptions?

• A. Norris-LaGuardia Act
• B. Wagner Act
• C. Employee Polygraph Protection Act
• D. Family Medical Leave Act

Answer: (C)

The key idea is that this act locks down the use of polygraph tests in the private sector. It generally bars employers from using lie detector tests for both pre-employment screening and during employment, because polygraphs are seen as unreliable and invasive for making personnel decisions. The exemptions are narrow and mainly relate to government-related or highly security-sensitive contexts where a polygraph might be allowed under specific federal requirements. The other acts cover different workplace rights (such as organizing, labor relations, or leave) and don’t address lie detector testing.