Nationwide Polygraph Examiner Listings -

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Nationwide Polygraph Examiners and Lie Detection Professionals
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Nationwide Listings for Credibility-Assessment Polygraph Professionals

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How does a polygraph work?

A polygraph records microscopic changes to a person's body at four points as they answer Yes or No to a pattern of questions.
Scoring involves comparisons of various responses.
Following standards reached through Government studies, a Pass or a Fail can be applied to each response.

polygraph test chart

What body parts are touched during a polygraph examination?

The attachments to the body are made at:
--left arm
--right hand

polygraph connect to the body

What are the steps of a polygraph examination?

A polygraph examination is broadly broken into three parts:

1. Pre-Test
(explanation and question development)
2. In-Test
(chart collection)
3. Post-Test

How accurate is a polygraph test?

In most major cities you can not become a police officer without first passing a polygraph test.

Same with FBI and other Federal investigative agencies.

How many questions can I ask to be used on a polygraph test?

Most examiners use a format that allows up to 4 questions of importance.

How can I increase the accuracy of a polygraph test?

--be well-rested
--don't be dehydrated
--use questions answerable with a Yes or a No
--use questions no more than 20 words long