--

I gotta get me one of these...

yes, they are narrow and dark and very noisy..but...might save on wiring of thalami:

"Now fMRI is also poised to transform the security industry, the judicial system, and our fundamental notions of privacy."

http://www.wired.com/wired/archive/14.01/lying.html
Permalink Chris McKinstry 
January 4th, 2006
I bet it can be subverted.
Permalink Colm O'Connor 
January 4th, 2006
Sure, but think of the training sessions.
Permalink AllanL5 
January 4th, 2006
Heh. One of my professors told us the trick to beating a polygraph. Does take training though. (Yes, it's linguistics-related.)
Permalink Flasher T 
January 4th, 2006
I got a big fat thalami right here...
Permalink hoser 
January 4th, 2006
Looks like the CIA can sell that plane.
Permalink  
January 4th, 2006
I read apiece of fiction five or six years ago about this exact subject. It was called "The Truth Machine". The story takes place between the 1990's and the 2050's and describes the changed to society and the judicial system as Truth Machines become not only common, but inexpensive (you can get one as an attachment to your digital watch, and it works at a distance of up to five feet).

Very interesting book. The concept was great (even though the characters were a bit flat).
Permalink BenjiSmith 
January 4th, 2006
Beating a polygraph is "easy." You just have to not be worried about getting caught. Most of the action of the polygraph is in convincing you it's infallible, which makes you nervous when you lie.
Permalink MarkTAW 
January 4th, 2006
Flasher T,

what's the linguistics related trick?
Permalink Kasey 
January 4th, 2006
The trick is to quickly ask yourself a different question. For example, the interrogator asks, "Did you kill Mark Bryan Warner on the night of November 3rd?". The truthful answer would be Yes. But in your mind, you quickly ask yourself, "Do I like peanut butter and canned tuna sandwiches?", and answer aloud, "No".

Does take training though.
Permalink Flasher T 
January 5th, 2006
I can't see how that would avoid the initial reaction to the question. The classic way to beat the polygraph is to set up a parallel cover story internally and before the test ever starts switch into that persona completely.

Which is similar but considerably more detailed.
Permalink Simon Lucy 
January 5th, 2006
"I can't see how that would avoid the initial reaction to the question."

It's natural to be startled by a question, even if you're innocent - particularly since polygraph tests are based on intimidation. Yes, you get slightly freaked when you're asked if you've killed a man, it's to be expected.
Permalink Flasher T 
January 5th, 2006
Meditation techniques are reasonably effective at defeating a polygraph -- most of the things it measures are possible to exercise control over with a little practice. In the long run, though, it's easier just to be sociopathic. :)
Permalink Mat Hall 
January 5th, 2006
I figured you could just practice with a polygraph. A polygraph is simply a biofeedback machine, and as such, you can use it to train yourself to beat it.

At the gym, I could raise & lower my heart rate on the ellipsiciser because of the constant readout.
Permalink MarkTAW 
January 5th, 2006

This topic was orginally posted to the off-topic forum of the
Joel on Software discussion board.

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