Costs        |        Employee Theft Testing       |     Pre-Employment Polygraphs      |        Infidelity  Polygraphs        |        Contact

How accurate is a polygraph?

For Polygraph Lie Detector Tests in Southern California
909-398-1228

Costs and Fees for a Truth or Lie Polygraph Examination


Polygraph Lie Detector FAQ

When are polygraph lie detector tests used?

Can you force employees to take polygraph lie detector tests?

Pre-employments Polygraphs for Police Agencies, Armored Transport, and others?

Can a polygraph lie detector test be used for infidelity and cheating spouse issues?

Who uses polygraph services?

What happens in a polygraph lie detector test?

How is the lie detected in a polygraph lie detector exam?

How accurate is a polygraph lie detector test?

Will a polygraph lie detector test give a false positive?

Are there errors in a polygraph lie detector test?

How can you beat a polygraph lie detector test?

Is a polygraph lie detector test admissible in court?

Who gets the results of the polygraph lie detector exam?

How to choose a qualified polygraph expert?


Background of
Owner Polygraph Expert:
Martin Schermerhorn

for more information
Truth or Lie Polygraph Examination Agency
Phone: 909-398-1228

E-mail: marty@truthorlie.com


Costs and Fees for a Truth or Lie Polygraph Examination


Where will we give polygraph tests? Southern California, Los Angeles, Pasadena, Arcadia, Monrovia, Covina, Duarte, Glendora, Azusa, San Dimas, La Verne, Claremont, Pomona, San Marino, Whittier, Pico Rivera, Irwindale, Alhambra, Orange, and San Bernardino Counties, San Gabriel, Pomona, and Big Bear Valley for Lie Detector Tests


Outside of So. Calif.? Find a Polygraph examiners at
http://www.polygraph.org


How accurate is a polygraph?

While the polygraph technique is highly accurate, it is not infallible and errors can occur. According to the American Polygraph Association over 250 studies have been conducted on the accuracy of polygraph testing during the past 25 years. Recent research reveals that the accuracy of the new computerized polygraph stytem is close to 100%.

Most errors occur with inexperienced polygraph examiners. Just as one doctor can look at an x-ray, and not see a problem, while the next, more experienced doctor can, so it goes with polygraph charts.

Occationaly you will hear reports from those who fear the polygraph may not be accurate. The APA answers them with this:

One of the problems in discussing accuracy figures and the differences between the statistics quoted by proponents and opponents of the polygraph technique is the way that the figures are calculated. At the risk of over simplification, critics, who often don't understand polygraph testing, classify inconclusive test results as errors. In the real life setting an inconclusive result simply means that the examiner is unable to render a definite diagnosis. In such cases a second examination is usually conducted at a later date. To illustrate how the inclusion of inconclusive test results can distort accuracy figures, consider the following example: If 10 polygraph examinations are administered and the examiner is correct in 7 decisions, wrong in 1 and has 2 inconclusive test results, we calculate the accuracy rate as 87.5% (8 definitive results, 7 of which were correct.) Critics of the polygraph technique would calculate the accuracy rate in this example as 70%, (10 examinations with 7 correct decisions.) Since those who use polygraph testing do not consider inconclusive test results as negative, and do not hold them against the examinee, to consider them as errors is clearly misleading and certainly skews the figures.


California based agency, local to Southern Califiornia, especially the Los Angeles, Orange County, Riverside, San Gabriel Valley, Pomona Valley, San Bernardino, and Big Bear Areas.

Over 25 years of experience in law enforcement,
interrogation and truth detection.

Martin Schermerhorn, certified polygraph examiner,
has advanced training and is current in the latest techniques, and technologies.

Note the navigation panel to the left.
Many of your questions will be anwered there.

Or, call 909-398-1228

Southern California, Los Angeles, Pasadena, Arcadia, Monrovia, Covina, Duarte, Glendora, Azusa, San Dimas, La Verne, Claremont, Pomona, San Marino, Whittier, Pico Rivera, Irwindale, Alhambra, Orange, and San Bernardino Counties, San Gabriel, Pomona, and Big Bear Valley for Lie Detector Tests

San Gabriel, Pomona, and Big Bear Valley for Lie Detector Tests