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Not Ready for Prime-Time Lying

Discussion in 'Cop Talk' started by 9L82, Mar 5, 2010.

  1. 9L82

    9L82 Caffeine Addled

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    Just completed CVSA (Computerized Voice Stress Analysis) training last week. Hooked-up my 13yr old to the CVSA for practice. He admitted to stuff he shouldn't have even before I started the test. Guess I'm glad he is a bad liar. I'm available for rent to all of the parents of teenagers out there!
     
  2. Straight Pipe

    Straight Pipe

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  3. cowboywannabe

    cowboywannabe you savvy?

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    how does that work? what are the priciples or measures it uses?
     
  4. 9L82

    9L82 Caffeine Addled

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    The sound waves are analyzed for signs of stress. It is really just an expensive prop for a good interrogator. You look at the amplitude and length of the pattern.


    Basically useless, in my opinion, unless you know how to go at someone
     
    Last edited: Mar 5, 2010
  5. cowboywannabe

    cowboywannabe you savvy?

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    wow. i didnt know the voice responces varied so much when the human ear cant detect the differences.
     
  6. 9L82

    9L82 Caffeine Addled

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    You analyze yes and no responses only. I admit I did see the changes when I really looked for it, but it can be manipulated very easily.
     
  7. steveksux

    steveksux Massive Member

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    Who makes the CVSA, anyway? Xerox?

    [​IMG]

    Randy
     
  8. CAcop

    CAcop

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    Does it come in a kit with a board with a whole bunch of letters and a little thingy to slide around the board?
     
  9. MeefZah

    MeefZah Cover is Code 3

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    I was gonna ask what your impressions of it were. I'm an examiner... Well, I was an examiner until I (oopsie) let my certification lapse. Hated the GD thing.

    I think the CVSA is unreliable at best. On numerous instances I've known it to erroneously indicate deception when there was none, and no deception when we found out later there was.

    I really dislike any truth verification device, especially in pre employment. I tend to put a bit more faith in the poly but neither is a good sub for good investigative or interview techniques.
     
  10. 9L82

    9L82 Caffeine Addled

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    Way too subjective to be of much use. Our investigators usually get some sort of confession of admission BEFORE they conduct the test...big psychological game
     
  11. steveksux

    steveksux Massive Member

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    I'm just guessing here, but I'd think if the subject knows its unreliable, it won't trip him up. If the subject thinks its accurate, and is lying, it ramps up the stress level enough that it might just be fairly accurate..

    Randy
     
  12. 9L82

    9L82 Caffeine Addled

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    Exactly, it's a mind game
     
  13. lawman800

    lawman800 Juris Glocktor

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    It just keeps getting better, don't it?
    Another variation of the polygraph witch hunt for departments to manipulate.