Polygraph Testing

[Roch]

Yes, very diverse. Are you thinking of buying some?

Well I feel a bit embarrassed to admit that I did fancy a Clegg Impact Soil Tester 

[Bridget]

Well I feel a bit embarrassed to admit that I did fancy a Clegg Impact Soil Tester 

Funny you should say that, I thought the piece about the Peak Clegg Impact Test was fascinating..

[Roch]

Funny you should say that, I thought the piece about the Peak Clegg Impact Test was fascinating..

Clegg knows his hammer drops alright 

[jon]

£10,000? I hope Jon has been saving up..

Bridget , my offer stands , if you think they are junk ,
prove it by beating the test , did think they were cheaper mind !!
My offer is not only to you but any other long term guilty member
who think's they are junk and can beat the machine !!

[OnceSaid]

As it stands, evidence which is presently allowed in court, eye witness testimony, finger print evidence, expert evidence, dna evidence, none of which is 100% accurate but yet all of which have played their part in wrongful convictions in the past.

Witnesses can be found, experts willing to give their opinions can be called upon, DNA samples can be taken from the accused, but a person can not be forced to take a polygraph.  They are not in control of the questions, or the results, and know that in a court of law the results will never be heard, but yet there are people who claim to be innocent asking to take these tests.  I think that says a lot.

[Bridget]

Bridget , my offer stands , if you think they are junk ,
prove it by beating the test , did think they were cheaper mind !!
My offer is not only to you but any other long term guilty member
who think's they are junk and can beat the machine !!

Jon, I'm more than happy to do it but I just don't see the point? I haven't said I can beat the test, I've said the test is rubbish - and lets face it, you'll never know whether I was actually telling the truth or deliberately lying anyway, since you don't know anything about me. It costs £500 +, I have a feeling it's not going to happen anyway...

[jon]

Jon, I'm more than happy to do it but I just don't see the point? I haven't said I can beat the test, I've said the test is rubbish - and lets face it, you'll never know whether I was actually telling the truth or deliberately lying anyway, since you don't know anything about me. It costs £500 +, I have a feeling it's not going to happen anyway...

I am happy to foot the bill , you said the test was junk
i took this to mean , it is easily beaten , we all know it's worthless in a UK
court , why would i not know if you was lying , if you allowed me to see the results ?
If you come to this case looking for the truth taking the test may open your eyes , do you not think ?

[Bridget]

I am happy to foot the bill , you said the test was junk
i took this to mean , it is easily beaten , we all know it's worthless in a UK
court , why would i not know if you was lying , if you allowed me to see the results ?
If you come to this case looking for the truth taking the test may open your eyes , do you not think ?

It may or may not be easily beaten, but that has never been my point. But think about it - I could tell you that I had passed the test even though I had told a pack of lies, and you would never know whether they were lies or not - would you.

[OnceSaid]

It may or may not be easily beaten, but that has never been my point. But think about it - I could tell you that I had passed the test even though I had told a pack of lies, and you would never know whether they were lies or not - would you.

The polygraph comes with a full written report.  All that would need to be done was to give a copy to the person who arranged and paid for the test to be done.

[OnceSaid]

What is a Polygraph Test?
A Polygraph test takes between 2 to 3 hours and consists of three phases; a pre-test interview, collection of charts, and analysis of charts. Polygraph tests are the most fool proof method of testing if someone is being deceptive.

Pre-test interview & formulation of questions
During the pre-test interview the examiner will explain how the polygraph works, discuss the issue and develop and review all questions to be asked on the polygraph test. This stage is normally the longest to complete, and will take anywhere between 45 and 90 minutes.

Collection of Charts-
During this phase the subject will be attached to the polygraph. The set of questions which were developed during the pre-test interview will be asked 3 or 4 times.

Analysis of Charts-
Once the examiner has collected the charts he will analyze the results before giving a decision as to the subjects truthfulness or deception to the given issue.

Will I know the questions to be asked on the polygraph examination?
Yes! The examiner will construct questions from the information given by you to cover the specific issue. He will review the questions with you and make any changes to the questions to ensure that you both agree. All the questions will meet the strict rules for the latest polygraph techniques in accordance with the APA. 

All questions are discussed with the subject thoroughly before the test commences and will be answered with a "yes" or "no" answer only.


How reliable is Polygraph Testing?
There is no doubt that the polygraph is highly reliable, providing the person using it is properly trained and the technique they use is validated. The American Polygraph Association (APA) has gathered over 200 studies on the subject. click here visit their website.
How Does the Polygraph Work?
The polygraph works by tracing changes in a person's physiological conditioning during questioning. These changes are recorded directly on to the polygraph charts in order that they can be reviewed. Some of the changes that occur may replicate those that have been linked with truth or deception for many years. These physiological changes have been the subject of various research projects and our examiners have undertaken many hours of polygraph chart analysis instruction to interpret them.  The Polygraph charts are generated by attaching four components to the subject.

Pneumograph
Two convoluted rubber pneumograph tubes are placed around the subject's upper chest and abdomen on the outside of their clothing, these record respiration and movement.

G.S.R
The GSR or Galvanic Skin Response is produced by placing two finger plates across fingers on one of the subject's hands. These trace changes to the skin resistance during the examination.

Cardiosphygmograph
This component traces changes to the subjects relative blood pressure and pulse rate and it is similar to the pressure cuff your doctor uses when taking your blood pressure.  After the questions have been asked with the subject attached to the polygraph the examiner will read the generated charts to establish truth or deception. The  agreed questions will always be asked at least twice.
http://www.terrymullins.co.uk/what-is-a-polygraph-test.html

[susan]

Hi Oncesaid I thank you for the excellent report you posted on the polygraph testing you have researched well.  Mat was asking yesterday if the time that has elapsed from the crime to doing the test has any bearing on the results.  Like Jeremy something like 20 years.  Does alcohol in the body affect the test.  Thanks for the links.

[susan]

Morning Bridget  now behave yourself you are not going to tell a pack of lies during your polygraph testing

[lookout]

What is a Polygraph Test?
A Polygraph test takes between 2 to 3 hours and consists of three phases; a pre-test interview, collection of charts, and analysis of charts. Polygraph tests are the most fool proof method of testing if someone is being deceptive.

Pre-test interview & formulation of questions
During the pre-test interview the examiner will explain how the polygraph works, discuss the issue and develop and review all questions to be asked on the polygraph test. This stage is normally the longest to complete, and will take anywhere between 45 and 90 minutes.

Collection of Charts-
During this phase the subject will be attached to the polygraph. The set of questions which were developed during the pre-test interview will be asked 3 or 4 times.

Analysis of Charts-
Once the examiner has collected the charts he will analyze the results before giving a decision as to the subjects truthfulness or deception to the given issue.

Will I know the questions to be asked on the polygraph examination?
Yes! The examiner will construct questions from the information given by you to cover the specific issue. He will review the questions with you and make any changes to the questions to ensure that you both agree. All the questions will meet the strict rules for the latest polygraph techniques in accordance with the APA. 

All questions are discussed with the subject thoroughly before the test commences and will be answered with a "yes" or "no" answer only.


How reliable is Polygraph Testing?
There is no doubt that the polygraph is highly reliable, providing the person using it is properly trained and the technique they use is validated. The American Polygraph Association (APA) has gathered over 200 studies on the subject. click here visit their website.
How Does the Polygraph Work?
The polygraph works by tracing changes in a person's physiological conditioning during questioning. These changes are recorded directly on to the polygraph charts in order that they can be reviewed. Some of the changes that occur may replicate those that have been linked with truth or deception for many years. These physiological changes have been the subject of various research projects and our examiners have undertaken many hours of polygraph chart analysis instruction to interpret them.  The Polygraph charts are generated by attaching four components to the subject.

Pneumograph
Two convoluted rubber pneumograph tubes are placed around the subject's upper chest and abdomen on the outside of their clothing, these record respiration and movement.

G.S.R
The GSR or Galvanic Skin Response is produced by placing two finger plates across fingers on one of the subject's hands. These trace changes to the skin resistance during the examination.

Cardiosphygmograph
This component traces changes to the subjects relative blood pressure and pulse rate and it is similar to the pressure cuff your doctor uses when taking your blood pressure.  After the questions have been asked with the subject attached to the polygraph the examiner will read the generated charts to establish truth or deception. The  agreed questions will always be asked at least twice.
http://www.terrymullins.co.uk/what-is-a-polygraph-test.html

Brilliant. Not the kind of test you'd volunteer for if there was a hint of guilt.

[lookout]

Though whether it fluctuates along with a bout of hypertension ( similar to " white-coat syndrome " ) I wouldn't know. Which at the same time wouldn't necessarily point to guilt,,but would naturally give a false reading.

[susan]

Morning lookout  I would think this would be taken into account by the person carrying out the test as it is human nature that a reaction of some type would be experienced before the test was taken.We will have to ask oncesaid who has obviously done research into polygraph testing.