LIEDEX Polygraph Services

Polygraph Information

What Happens During a Polygraph Test?

A step-by-step explanation of how a polygraph examination is conducted, from the pre-test interview to the final results.

Why Polygraph Testing Must Be Done in Person

We offer on-site polygraph examinations for employers, security companies, logistics teams, stores, and private clients.

How Long Does a Polygraph Examination Take?

An explanation of test duration, why most tests take 40–90 minutes, and what factors affect timing.

What Confidentiality Means in Polygraph Testing

Explains how personal and professional information is handled and protected during testing.

Workplace vs Private Polygraph Testing

Explains the difference between employer-based testing and private testing, and how each is conducted professionally.

All information provided is educational and explains professional polygraph procedures. Testing is conducted in person in Gauteng.