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Why do errors occur in a Polygraph Lie Detector test?

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


Some of the most frequent errors may be caused by ...

  • misinterpretation of the data on the charts
  • lack of training and experience of the polygraph examiner
  • counter-measures from the examinee
    a lack of quality control review
  • equipment malfunction
  • failure to properly prepare the examinee for the examination
  • poorly worded test questions
  • improper assessment of the examinee's emotional and physical condition ·
  • improper use of testing techniques
  • Why Critics Figures Vary

    (the following if from the American Polygraph Association)

    "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."


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