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Types of polygraph tests
Pre Employment Verification tests
Specific incident tests
Sex offender tests
Computerized integrity tests
Quality control reviews
Expert witness testimony
Polygraph examiner training courses
Polygraph Instrument sales
Liecatcher was founded in 2005 and ever since it has been providing professional lie detection, internal investigations and teaching around the world .
All examiners are accredited and
have years of experience in the field.
The company has provided services in:
Bulgaria, Colombia, Costa Rica, El Salvador, Ethiopia, Guatemala, Israel, Mexico, Poland, Russia ,Singapore, Thailand, South Africa and the United States.
Tuvia Shurany is the author of "Evaluation of Polygraph Charts: Formats, Criteria and Scoring." The book shows evaluation criteria, formats and has numerous examples for practice.
The book is recommended as a valuable handbook by Cleve Backster and Dr. James Allan Matte. The book is also available in Spanish.
What is a polygraph test?
A polygraph test is a semi scientific procedure in order to verify the truthfulness of a person regarding certain questions he or she is asked.
The procedure is divided into three parts:
Pre-test interview - this part is dedicated to explain to the examinee how the system works. The examiner will familiarize the examinee with the questions he or she will be asked during the examination.
Data Collection - the examiner will attach four sensors to the examinee over the clothes (a chest sensor and abdominal sensor two finger electrode and a cardiovascular cuff). After attaching the sensors the examiner will collect 2 to 4 charts of physiological data. The examinee must sit still without any movement as unobserved movement can show a reaction which can be interpreted as a lie.
Conclusion - After collecting the data the examiner will evaluate the charts and determine the truthfulness of the examinee.
Can the test harm the examinee?
A polygraph test can not affect a person's health! If you have any health problems inform the examiner.
We are proud members of the following associations .
Publications in the European Polygraph Journal by Mr. Shurany and Ms. Chaves:
The "Pre-test Interview; the foundation of Polygraph," shows the proper way of performing a pre-test interview and written by Tuvia Shurany & Nathan J. Gordon. The book is also available in Spanish.
Mr. Shurany is the founder and owner of Liecatcher Polygraph Services.
Tuvia has over 30 years of experience in all types of polygraph tests.
He is a member of six international polygraph associations, and has served as an APA accredited school director three times, primary instructor. Mr. Shurany is available for quality control reviews and international consultantations.
Influence of Case Facts on Blind Scorers of Polygraph Tests.
A Field Study on the Validity of Quadri-Track Zone Comparison Technique.
Confirmed Mental Countermeasure Case in Costa Rica
Polygraph verification test.
Testing Deaf Mute Examinee in Costa Rica.
The Integrated Zone Comparison Technique and ASIT.
Utilizing the Polygraph Validation Test (PVT) In Solving Conflicted Polygraph Results and Confirming results with PVT.
Confirming Deliberate Distortions by Examinees.
Anticlimax Dampening Concept – Does Exist.
As a client, what are my benefits from using the service?
Adriana has been an examiner since 2010, and graduated an APA accredited course. She has five years experience in HR, and is highly experienced in pre-employment testing.
Ms. Chaves is a partner in Liecatcher Polygraph Services. She has been a
polygraph examiner since 2002, and is a graduate of an APA accredited training facility. Fabiola had successfully trained in post convicted sex offender testing.
In addition, she is a specialist in auditing investigations and testings, and is experienced in testing Deaf Mute examinees.
An integrity test is based on a computerized questioner which has the capability to analyze the interviewee's state of mind regarding varies aspects.
The service can be obtained in two forms:
Receiving the computerized report.
We can also interview the person based on the computerized and present a full report based on the verbal and computerized outcome.
How long does it take?
Clearing the name of an innocent person, employee or company from false accusations.
Assist clients in loss prevention procedures. This service has already proven itself effective and reduced losses by thousands of dollars.
Gives an employer a good tool for identifying the best applicants, ensuring the integrity and work ethic of existing employees, and when specific incidents occur allows suspicion to be removed from honest employees, and for the immediate identification of culpable employees.
Allow yourself at least two hours for the test. Arrive at the polygraph laboratory at least 10 minutes before your scheduled appointment.
The test itself can take between 60 and 90 minutes and in some cases even more.
There examiner cannot take any shortcuts, since doing so might affect the accuracy of the result.
In case you don’t have the required amount of time for a proper test to be conducted, ask for the test to be re-scheduled.
Liecatcher provides the following types of training:
Basic polygraph training accredited by the International Society of Polygraph Examiners and the American Polygraph Association.
Advanced training for polygraph examiners.
Polygraph examiners continuing education seminars.
Interview skills (including pre-employment interview, background verification and how to understand and effectively utilize verbal and nonverbal behavior).