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Frequently Asked Questions

Any questions about polygraph examinations?

A lie detector test (polygraph examination) normally takes between two and three hours. The lie detector examination process is split into three sections:

  • Lie detector pre-test interview. This is where background information is collected, relevant issues are discussed in detail and formulation of both relevant and comparison questions is agreed.
  • Collection of data. The polygraph examiner attaches the components of the “lie detector instrument” to the examinee and asks the agreed polygraph examination questions.
  • Post-test interview. The polygraph examiner re-interviews the examinee, discusses their initial feedback from the lie detector process and questions them about any initial observations.