(818) 883-6969
John Grogan Polygraph

You should know:


During a polygraph exam, we are recording microscopic changes to blood volume, skin conductance, upper breathing and lower breathing, as the examinee responds to a rehearsed 10-question script.

The examinee needs to sit very still. Answering yes or no with his/her mouth only, not with any head movement. Answering all questions at the same volume.

Four key questions from the client will be used as the heart of the exam. Be sure that each question is no more than 13 words long each, that the questions have no 'and' or 'or' in them, and that there are no 'softening' words (we don't say 'affair' or 'sleep with'; we say 'have sex with' or 'have sexual contact with').

The computer instantly and accurately scores the charts in between each test, so we will know which questions they did good on and did bad on, before we go on to the next test chart 5 minutes later.

If all guidelines and instructions are followed, we can expect in the area of 95% accuracy.ro polygraph  

English and Spanish.

Also available:
Voice Polygraph


Free consultation.


  Polygraph Examinations
and Lie-Detection for
Illinois

Serving Chicago, Aurora, Rockford, Joliet,
Springfield, Peoria, Elgin, and other nearby cities

Just a simple site to explain what to expect,
and how to make lie-detection work for you!
Grogan polygraph

Verify first that:

1 . . . your exam will be done on a modern $6000 computerized polygraph instrument, NOT on an old antique 'roll of chart paper with 4 pens'. You want the accuracy and sensitivity of a computerized instrument, and you want a computer to blindly score the test charts (you do not want a human to be doing the scoring, someone who can miss something or can be biased to be too easy or too hard).

2 . . . the accuser/client (spouse or victim) would be allowed, if desired, to quietly monitor the entire exam from an out-of-examinee's-view area or from a remote area.

3 . . . your examinee will be tested 3 times in a row, using standard 10-question charts (best for accuracy); with 25 seconds in between each question it means he/she will actually be 'on the polygraph' for 3 five-minute periods, with a short break in between each.

4 . . . you are permitted to arrive with the 4 key questions you would like to have asked during the exam. Have them written out, put plenty of thought into them. If you think that your situation needs more than 4 questions to cover it, speak to your examiner about this ahead of time.

 

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Getting the truth for you

Polygraph is the world's most accurate lie-detection tool.

In virtually every city in the United States, you can not become a police officer without first passing a polygraph examination. Continual improvements in polygraph technique and instrumentation has increased the ability to pinpoint truth and lies better than just a decade ago.

But not all have the same training & experience.
Contact us for a free consultation to see the difference.
Our staff of experienced lie-detection professionals are available to serve you days, nights, and weekends, at
our locations or at your residence or business location.


Polygraph examinations can be conducted
by Illinois examiners at your  location,
or at our polygraph locations,
and we also cover these areas:

Anaheim, Garden Grove, Santa Ana, Buena Park, 
Huntington Beach, Fullerton, Aliso Viejo, Irvine,
Costa Mesa, Laguna Niguel, Redondo Beach,
Woodland Hills, San Jose CA; Beverly Hills,
Redding CA Los Angeles, Baker, Needles CA;
San Diego, Northridge, Santa Clarita, Van Nuys,
Valencia, Newhall CA, Oxnard, Thousand Oaks,
Newbury Park, Port Hueneme, Simi Valley,
Camarillo, Ojai, Ventura, Torrance, Long Beach,
San Francisco, Sacramento CA, La Crescenta,
Palmdale, Lancaster,  Malibu, Canoga Park,
Long Beach, Pacific Palisades, BelAir,
Moorpark, Santa Monica, Bakersfield CA
;
Boise & Coeur d'Alene Idaho;
Pittsburgh, Erie, Stroudsburg,
Philadelphia, and Reading PA;
New York City, Buffalo, Rochester,
Yonkers, Brooklyn, Long Island,
 Syracuse, Albany, New Rochelle,
Mount Vernon, Queens, Manhattan,
 Schenectady, NYC, and Utica NY
Seattle, Tacoma, Federal Way,
Vancouver, and Spokane WA;
Arizona, Washington, Colorado,
Florida, Georgia, Rhode Island,
Baltimore, Frederick, Gaithersburg,
and Hagerstown Maryland;

Wilmington, Dover, Newark, Hockessin,
and Glasgow Delaware;
Connecticut, New York, Pennsylvania,
Canada, and Mexico.


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