Polygraph Testing & Lie Detection

Trusting people is not always possible if the person is untrustworthy. Sometimes you need help to find the truth and help to get peace of mind. Lie detection via polygraph testing is the process of using technology to monitor and record the various manifestations of the sympathetic and parasympathetic nervous systems through prudently designed questions asked of the individual who is attached to the polygraph.

The manifestations of the Sympathetic and Parasympathetic Nervous Systems are comprised of deviations in blood pressure, pulse rate, electrodermal activity, and respiration. A polygraph or lie detector is a diagnostic instrument that is used by a professionally trained and experienced polygraph examiner who administers the examination in order to verify the truthfulness of a person’s claim regarding a precise issue.

Many people believe that polygraphs are inaccurate and create more problems than they solve. This is a very normal concern; however, it is essential to know that in a specific issue test, while using a validated technique, the average accuracy of a polygraph will exceed 90%.

Our professionals use voice stress analysis along with polygraph testing to determine truth. Voice stress analysis can be used in a variety of ways: in person, via recorded message, telephone, radio communications, and even archived recorded material.

Voice stress analysis is useful in the selection of qualified candidates in which stress and emotional reaction are a priority, or for professionals who have to perform critical negotiations or interpersonal assessment.

Voice stress analysis and lie detector tests can be used to measure the voice stress of competitors during meetings, corporate theft and fraud, infidelity, business negotiations, insurance claim verification, and much more.

When you need the truth or peace of mind don’t let uncertainty take over your life. New York Intelligence Agency, Inc. is the best private detective agency New York has to offer. When you hire one of our highly trained and experienced professionals you can gain the answers that you need!


Today to schedule an appointment and learn more about how we can help.


J Avanti
5/5 Stars
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Although I never expected to require the services of a private investigator, I found myself in just such a situation. David Schassler of New York Intelligence came through for me! He quickly, discretely, and efficiently collected the evidence I needed to support my divorce case. I can’t recommend David highly enough!
C Keating
5/5 Stars
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I initially hired New York Intelligence to conduct background searches for my business when I was starting a new division. He finished all 12 reviews right on schedule! And then my Cousin Bucky went missing…well, David Schassler left his own birthday party to start tracking Bucky and he found him before my Aunt Louise even had time to worry! My family and I can’t say enough good things about Mr. Schassler and his firm. Hire them – you won’t be disappointed!
B Hogan
5/5 Stars
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I have had many instances where my family has used David services and there has always been a positive outcome! Thanks Again Barbara
L James
5/5 Stars
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David Schassler’s firm solved my complex situation, by conducting hard to get interviews, which subsequently solved the case. I would recommend David to anyone who needs to get a tough job done.


Matrimonial Investigations & Voice Stress Analysis – Truth or Lie Detection along with Executive Protection.

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