Vyvance Medication

Vyvance Medication

A medication that may affect polygraph test data In the past, several people have asked me if the medication they have been prescribed will interfere with their polygraph test.  I tell them that most medications generally do not have a great impact on polygraph testing. However, there are some medications that do. Lafayette Instrument Company […]

Does Polygraph Really Work?

Does Polygraph Really Work?

Polygraph for the most part does work reliably. There are many good scientific studies that indicate that polygraph testing is much higher than the probability of chance. These studies indicate that polygraph is somewhere between 85 to 95% reliable. I have been doing polygraph tests for over 32 years and can only think of a […]

Employee Theft

Employee Theft

Workplace Thefts Workplace polygraph testing has declined since the passage of the American polygraph Protection Act.  The Employee Polygraph Protection Act of 1988 (EPPA) generally prevents employers from using lie detector tests, either for pre-employment screening or during the course of employment, with certain exemptions. Employers generally may not require or request any employee or […]

Polygraph Test with a Translator

Polygraph Test with a Translator

I did a very challenging polygraph test in the Baltimore County Jail today. The examinee didn’t speak or understand English. I’ve done many tests that required a translator and most of these examinations were in Spanish. The test took almost four hours and almost every word we spoke had to go through the translator. I […]