Normal Topic Don't Know If It's True (Read 2759 times)
Paste Member Name in Quick Reply Box Dr_Shakalu
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Don't Know If It's True
May 4th, 2008 at 5:50am
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Hey everyone.  Well, as I posted previously, I will be taking a polygraph test soon.  This is another, "a friend of a friend," tales.  Supposedly, an examinee was scheduled to take a polygraph exam the next day.  The day before the test, he jams his finger playing basketball.  During the test, he slightly puts pressure on his injured finger as a countermeasure and easily passes the test.  What does everyone think?  The Doctor.  P.S.  I am not asking for any flaming or accustations, just for the thoughts of others on this board.
  
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Paste Member Name in Quick Reply Box sackett
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Re: Don't Know If It's True
Reply #1 - May 4th, 2008 at 6:29am
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Yeah, sure, sounds like it would work for me...

Grin
  
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Paste Member Name in Quick Reply Box George W. Maschke
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Re: Don't Know If It's True
Reply #2 - May 4th, 2008 at 8:02am
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To be successful, a pain countermeasure must be applied timely with the asking of the control questions. Putting pressure on an injured finger could conceivably work, but it has some drawbacks:

1) One wouldn't want it to be the finger to which one of the galvanic skin response attachments will be connected (the index and ring fingers of one hand), as physical pressure against the plates may cause abnormalities in the GSR tracing;

2) If a digital plethysmograph is used as an alternative to a blood pressure cuff, one wouldn't want it to be the finger to which that is attached;

3) Physical movement of a finger might be observed;

4) It requires injuring oneself (and needlessly so).

You'll find a better, alternative pain countermeasure (tongue biting) explained in The Lie Behind the Lie Detector.
  

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Paste Member Name in Quick Reply Box Dr_Shakalu
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Re: Don't Know If It's True
Reply #3 - May 4th, 2008 at 4:25pm
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George W. Maschke wrote on May 4th, 2008 at 8:02am:
To be successful, a pain countermeasure must be applied timely with the asking of the control questions. Putting pressure on an injured finger could conceivably work, but it has some drawbacks:

1) One wouldn't want it to be the finger to which one of the galvanic skin response attachments will be connected (the index and ring fingers of one hand), as physical pressure against the plates may cause abnormalities in the GSR tracing;

2) If a digital plethysmograph is used as an alternative to a blood pressure cuff, one wouldn't want it to be the finger to which that is attached;

3) Physical movement of a finger might be observed;

4) It requires injuring oneself (and needlessly so).

You'll find a better, alternative pain countermeasure (tongue biting) explained in The Lie Behind the Lie Detector.


I'm glad you explained to me why it wouldn't work.  Otherwise I would've been parked in the parking lot and hitting my finger with a hammer, LOL Grin.  The Doctor.
  
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Don't Know If It's True

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