[extropy-chat] I knew this was coming

[Eugen Leitl]

On Tue, Nov 30, 2004 at 01:53:06AM -0500, Keith Henson wrote:

> It is too early to tell whether fMRI can be fooled in the same way as the 
> polygraph, says Faro. However, he says that the results are promising 
> because these characteristic brain patterns may be beyond conscious 
> control, rendering it much more difficult to cheat.

If this is just coarse-res elevated activity in a few areas, cheating would take about
the same finesse as fooling the polygraph.

They measure the difference in computation requirements in neutral
(calibration) questions vs. the value-laden ones. If you know which thought
pattern activates the same areas, and stop doing that when asked a critical
question, the pattern change will become much more difficult to track.

Also, currently high-resolution fMRI is a time-consuming process taking
several human experts and some very expensive, nonportable hardware. It's use
will be limited to very few high-profile cases -- where the subjects will be
far more likely to receive specific training how to fool the machine.

-- 
Eugen* Leitl <a href="http://leitl.org">leitl</a>
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