Lie Detection

11 years 1 month ago #30 by RK Manwong
Welcome to this topic!...discussion here on anything about the art of lie detection-polygraphy concerns :D

HE WHO DARES WIN!

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11 years 3 weeks ago #188 by LaDyJoHn
:)physiological and psychological signs and symptoms of guilt..
1. sweating
2. color change
3. dryness of the mouth
4. excessive activity of the adam's apple
5. fidgeting
6. "peculiar feeling inside"
7. subject's swearing to the truthfulness of his assertion
8. "spotless past record/religious man"
9. inability to look at the investigator "straight to the eye"
10. "not that i remember" expression
;D ;D

nothing.. not even time or space.. could bind or limit how much i feel for you..

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11 years 3 weeks ago #235 by baguiogal

The polygraph instrument has undergone a dramatic change in the last decade. For many years, polygraphs were those instruments that you see in the movies with little needles scribbling lines on a single strip of scrolling paper. These are called analog polygraphs. Today, most polygraph tests are administered with digital equipment. The scrolling paper has been replaced with sophisticated algorithms and computer monitors.

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11 years 3 weeks ago #236 by baguiogal

When you sit down in the chair for a polygraph exam, several tubes and wires are connected to your body in specific locations to monitor your physiological activities. Deceptive behavior is supposed to trigger certain physiological changes that can be detected by a polygraph and a trained examiner, who is sometimes called a forensic psychophysiologist (FP). This examiner is looking for the amount of fluctuation in certain physiological activities. Here's a list of physiological activities that are monitored by the polygraph and how they are monitored:

Respiratory rate - Two pneumographs, rubber tubes filled with air, are placed around the test subject's chest and abdomen. When the chest or abdominal muscles expand, the air inside the tubes is displaced. In an analog polygraph, the displaced air acts on a bellows, an accordion-like device that contracts when the tubes expand. This bellows is attached to a mechanical arm, which is connected to an ink-filled pen that makes marks on the scrolling paper when the subject takes a breath. A digital polygraph also uses the pneumographs, but employs transducers to convert the energy of the displaced air into electronic signals.

Blood pressure/heart rate - A blood-pressure cuff is placed around the subject's upper arm. Tubing runs from the cuff to the polygraph. As blood pumps through the arm it makes sound; the changes in pressure caused by the sound displace the air in the tubes, which are connected to a bellows, which moves the pen. Again, in digital polygraphs, these signals are converted into electrical signals by transducers.

Galvanic skin resistance (GSR) - This is also called electro-dermal activity, and is basically a measure of the sweat on your fingertips. The finger tips are one of the most porous areas on the body and so are a good place to look for sweat. The idea is that we sweat more when we are placed under stress. Fingerplates, called galvanometers, are attached to two of the subject's fingers. These plates measure the skin's ability to conduct electricity. When the skin is hydrated (as with sweat), it conducts electricity much more easily than when it is dry.

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11 years 3 weeks ago #237 by baguiogal


source: howstuffworks.com  ;)

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11 years 3 weeks ago #240 by RK Manwong
NYA HA HA...thankz Baguiogal for this info...ang galeng...ala sa pinas eh...magkano kaya cost one complete set...i might set up a business on this NYA HA HA ;D

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11 years 3 weeks ago #268 by LaDyJoHn

NYA HA HA...thankz Baguiogal for this info...ang galeng...ala sa pinas eh...magkano kaya cost one complete set...i might set up a business on this NYA HA HA ;D


:)eeehh! wag na sir.. magsasayang ka lang ng pera mo.. ;D ;D.. the results of a polygraph examination are inadmissible in evidence due to the following reasons:
1. it is still in the experimental stage and has not received that degree of standardization of acceptance among scientists..
2. the trier of facts is apt to give almost conclusive weight to the polygraph expert's opinion..
3. there is no way to assure that a qualified examiner administered the test..
4. the examinee may unwittingly waive his right against self-incrimination..
5. the test itself cannot be relied upon because it has many errors..


so there..  ;D ;D

nothing.. not even time or space.. could bind or limit how much i feel for you..

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11 years 2 weeks ago #595 by RK Manwong
nya ha ha, try to realize that polygraphy is useful as an aid in investigation, we are not after its result to be presented in court, we after the totality of the result of the investigation. In this country, we do not have much of this as a business venture while other countries are enjoying the private practice of the polygraph art.

the result, being  inadmissible as evidence, there are times that when the parties involved agreed to present it as evidence, its admissible and the court can consider it

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10 years 10 months ago #1999 by diamond
parang detection of earthquake's intensity... they depend on fluctuations... e pano kung super tensed ka lang tlga... hehehe... or pasmado ka lang. kulet noh? sabi na ngang d accepted for evidence-material qualification.  ;D

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10 years 7 months ago #2595 by jacob28
no comment

i wish dreams were like wishes and wishes come true couse in my dreams im always with you...

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10 years 2 months ago #3219 by abna6bee
IN CRIMINAL INVESTIGATION WE CANNOT RELY ONLY IN THE AID OF LIE DETECTOR. LIE DETECTOR CANNOT SOLVE A CRIME,, THERE ARE A LOT OF SUBJECT WHO ARE VERY LIAR.....LIE DETECTOR ONLY RECORDS THE PSYCHOLOGICAL AND PSYCHOLOGICAL RESPONSES OF THE SUBJECT PERSON....

IT IS USEFUL ONLY TO SOME COMPANIES NEEDS FOR A TRUTHFUL EMPLOYEES.

BUT THE BEST THING THAT INVESTIGATION WILL BECOME SUCCESSFUL IS DEPEND UPON THE ABILITY , SKILLS KNOWLEDGE AND CAPABILITY OF THE INVESTIGATOR TO CONDUCT INVESTIGATION

REMEMBER LIE DETECTOR CAN ONLY BE USE AS EVIDENCE BASE ON THE DISCRETION OF THE COURT.   

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10 years 3 weeks ago #3404 by RK Manwong
Lets change the notion that the result of polygraph examination is inadmissible as evidence in court, in fact it is in practice, as our court have recognized its importance in the adjudication of cases  :)

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10 years 2 weeks ago #3435 by junsy1951
I agree with you, SS. I wonder where our other forum enthusiasts got this notion that polygraph results are not admissible in court. While some doubts as to the reliability of the admissibility of the results of lie detector test, it has long been recognize as one of  a scientific methods of crime investigation and many cases has been solved using this method. Precisely why it is being taught as of the  criminology subjects. 

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9 years 9 months ago #3604 by charlyn
ANNOUNCEMENT!

polygraphy is soon to be admissible in court as evidence....they are working on that.... promise!

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9 years 9 months ago #3632 by McVrooks
polygraph is just an aid of an investigation but can be admissible as evidence in court when both parties agree that whatever the result of the actual test will be use as evidence,but it is not necessary to convict nor acquit the accuse.. it is still the descretion of the court.

Its a very Dangerous thing to know, we know everything..

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9 years 7 months ago #4046 by junsy1951
Baguiogal: The equipment you showed is made by Lafayette Instrument, Indiana, USA. Thats the one we have at UPH Las Pinas campus. A unit minus the laptop and printer costs $4,207.50 deliverd directly from USA. Ours is yet to be tested because of some data that the manufacturer needs to supply in the software program. I emailed them awhile ago and hopefully get the data soon. This instrument should now replace our analog lie detection machine though they still be used as historical relics of the past.

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9 years 5 months ago #4520 by RK Manwong

Baguiogal: The equipment you showed is made by Lafayette Instrument, Indiana, USA. Thats the one we have at UPH Las Pinas campus. A unit minus the laptop and printer costs $4,207.50 deliverd directly from USA. Ours is yet to be tested because of some data that the manufacturer needs to supply in the software program. I emailed them awhile ago and hopefully get the data soon. This instrument should now replace our analog lie detection machine though they still be used as historical relics of the past.


Any update in this sir junsy?
:)

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9 years 5 months ago #4521 by junsy1951
Thanks SS. The kit is now operating and ready to service the needs of our students on the subject. The software program is great. All the data could be stored in the computer and readings can be printed for records and file purposes by the students. Cool.

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9 years 5 months ago #4596 by Matt
incase meron kayong mga nakita na decided cases involving polygraph exam, paki post naman dito. tnx

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9 years 5 months ago #4597 by MR. M

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