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Topic summary

Posted by George W. Maschke
 - Nov 12, 2008, 11:09 AM
Polygraph testing has no scientific basis and is inherently biased against the truthful. It is not at all odd that a truthful person might repeatedly fail a polygraph "test" because although the procedure is invalid, it's not like a coin toss. One would fully expect a truthful person who has been sensitized to the relevant questions to "fail."

No inferences regarding a person's truthfulness or lack thereof can be safely drawn based on polygraph chart readings.
Posted by Howmanyistilthetruthisout
 - Nov 12, 2008, 10:58 AM
I'm tossed, if a polygraph is not always accurate but can be sometimes, shouldn't you get an accurate reading after 4-5 tests?  I know someone who's taken it 4 times and failed all of them.  Is she being dishonest or can anxiety make her fail over and over again?