What problems are suitable for Polygraph examinations?

The issue to be resolved must be clear and unambiguous. The examiner will discuss with you the question formulation prior to the exam.

How do I make an appointment?

Call the examiner directly or in the contact section of this website. You can book an appointment on-line. The examiner will contact you prior to the examination to discuss the issue you are dealing with.

Could I be forced to take an examination?

You cannot be forced to take an examination. The examination depends on your cooperation. You will be asked to read and sign a consent form to participate in an examination. This consent form outlines you rights and obligations with respect to the examination.

How accurate is the polygraph technique?

There are a number of studies you can find on the website. (http://www/ The examiner does not guarantee 100% accuracy, LorDen Polygraph Services will, if the circumstances are appropriate, judge a test to be inconclusive. In such a case another examination will be conducted on another date. There is no charge for a re-examination.

Can I beat the polygraph?

No, there are many myths about how to beat the polygraph. The examiner has many years experience and is able to detect those who are attempting to defeat the rest in any way. If you are not going to be truthful or are going to try to defeat the test, DO NOT TAKE THE EXAMINATION?

How do I prepare for an examination?

You do not have to prepare. Arrive at the office on time, rested and sober. Arrival under the influence of alcohol or drugs stop the examination and any monies paid in deposit will be forfeited. Take any prescription medication as normal and inform the examiner when asked.

If I am nervous, will that effect the test?

The examiner realises that an examinee may suffer from some form of nervous tension. Remember all questions are discussed and formulated with your participation. There are no surprise questions. All questions agreed upon will be posed to you at least three times while you are attached to the instrument.

Should I have Legal Representation?

If you have had a criminal allegation made against you it may be preferable to have a lawyer advise you. Any examination conducted under the auspices of legal representation retained by you is normally protected by a concept known as “privilege” so the disclosure of the examination, conversation and reports flowing from it are restricted.

May the results of the polygraph examination be used in court?

Not in Canadian Criminal Courts. Some consideration has been given to polygraph results in family courts and internal hearings.

What is a polygraph?

A polygraph is a scientific test that collects physiological data from a person with the purpose of detecting reactions associated to truth and deception. At least three systems with the human body are recorded during a polygraph examination. Respiratory activity is monitored by placing rubber tubes around the examinees upper and lower chest. Electro-dermal or “sweat gland” activity is monitored by placing two small attachments on the fingers or palm of the hand. Cardiovascular activity is collected by a blood pressure cuff or similar device.

It is important to note that the polygraph does not include analysis of the physiology associated with voice frequency, eye movement or skin temperature. Such instruments are not polygraphs and have shown to have limited scientific support.

What does a typical Polygraph examination entail?

A professional polygraph examination has three phases. A “pre-test” phase, and “in-test” or data collection phase and a post-test phase.

Pre-test - In the pre-test phase, the polygraph examiner will complete the required paperwork, complete a short background check to determine the examinee’s suitability for the exam and discuss the test questions.

In-test - In the in-test or data collection phase the examination takes place in a quiet room with no one else present to cause any distraction. The polygraph examiner will attach the polygraph sensors to the examinee and ask yes or no questions the have been previously discussed and agreed to. Data is collected in the form of polygraph charts. LorDen Polygraph Services only uses computerized polygraph instruments.

Post-test - In the post-test phase the examiner will discuss the entire examination with the examinee. The polygraph charts will be evaluated, and the examiner will render an opinion as to the examinee’s truthfulness to the questions asked during the examination. The examiner may discuss the results personally with the examinee or relate his/ her opinion in the form of a written report. 

How are examination results conveyed?

The examiner will provide a written report detailing the relevant or issue questions and his/ her opinion of the examinee’s truthfulness when answering those questions during the examination.

Who uses polygraphs?

Polygraph examinations are used by Federal and Municipal law enforcement agencies, government agencies, defence lawyers, insurance companies, private industry, therapists and private citizens.

How do I know if a Polygraph examiner is qualified?

The easiest way to be sure if you are being tested by a qualified examiner is to ask him/ her where he/ she was trained and what associations he/ she is affiliated with.

Do outside factors influence the outcome of the polygraph examination?

Polygraph examiners take specific steps to mitigate circumstances that may affect the results of the test. Outside factors are taken into consideration when administering the test and analysing the data.

Why are some polygraph examinations inconclusive (no opinion)?

An inconclusive or “no opinion” result means that there was insufficient information obtained during the data collect for the examiner to render a definitive opinion of deception or no deception. In such cases a second examination is usually conducted on another date. The classification of a polygraph examination as “inconclusive” protects the examinee from being falsely identified as deceptive when inadequate data is collected. At LorDen Polygraph Services there is no charge for a re-test due to an inconclusive result. 

Can a person fail a polygraph because of high blood pressure or nervousness?

No. while a person’s heartbeat and respiration rate may increase when he or she is nervous, a qualified polygraph examiner understands this and will take it into consideration when evaluating the examinee’s response. Unlike general nervous tension, an examinee’s reaction to deceptive responses is highly specific. Much of the nervousness is mitigated through the explanation of the procedure, review of questions and acquaintance test prior to the exam.

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