Gordon,
Quote:2). George's position is that no screening measure can catch spies.
It would be more correct to say that I am not aware of the existence of any screening measure that is capable of catching (detecting) spies at better than chance levels. This is not to say that no screening measure has any utility in making personnel security determinations. Certainly, such measures as financial record checks, criminal records checks, background investigations, and yes, polygraph interrogations (in the form of admissions obtained from naive subjects who don't understand that polygraphy is a fraud) have some utility.
Your initial characterization of my position regarding polygraphy was more to the point: "If I understand your position correctly, you believe that the polygraph is counterproductive to the national security because spies can so easily be trained to beat it, it gives a false sense of security to security personnel, and it causes too many false positives."
Quote:I would point out, however, that you were the first to raise the issue that belief in the polygraph is necessary. Therefore, I would ask you what evidence you have to support your assertion (in a different thread).
Whether polygraphy depends on a subject's belief in it is germane to the discussion at hand. My understanding of CQT theory is that the expectation that the truthful will respond more strongly to the "control" questions and the deceptive to the relevant questions depends on the subject's belief that deception will be detected, and that the "stim test" is used to reinforce that belief.
In any event, it has been argued that the main utility of polygraph screening is the admissions obtained therefrom. For example, former CIA and DOE counterintelligence chief Edward J. Curran, explaining on the CBS 60 Minutes II segment
"Final Exam" what good the polygraph is, after acknowledging that it is not scientific, stated:
Quote:It's a very, very, effective screening device, because, if people believe that that machine's gonna catch them in the lie, they're more willing to make statements or admissions to you prior to the test, or during the test.
It seems logical to suppose that the subject who doesn't believe in the lie detector will be less likely to make damaging admissions/confessions than the subject who does.
Perhaps if you ever get around to addressing the questions raised in the message thread
Theory of CQT-Polygraphy (Attn: Gordon Barland), which you've shrugged of for nearly a year, you could provide a theoretical explanation for why belief in the polygraph does not affect accuracy.
You also stated:
Quote:Incidentally, that same line of reasoning is why I refuse to discuss how Federal examiners are able to detect some unknowable proportion of people who use countermeasures on the polygraph; that would enable the Williamses, Maschkes and Scalabrinis of the world to improve their advice, which would damage the national security even more.
To what extent does our advice damage the national security? I think you confuse the vested interests of the federal polygraph community with the national interest. It seems to me that public information about countermeasures can only "damage" the national security to the extent that national security officials place any reliance on the pseudoscience of polygraphy. We've documented some of the damage done to national security by this misplaced reliance in Chapter 2 of
The Lie Behind the Lie Detector. I think that far from damaging national security, our publicly pointing out that the polygraph emperor is naked will ultimately strengthen it.