I may be going up against a Voice Stress Analysis test in a few months.  I am a bit confused what the difference is between Voice Stress Ananlsis and a polygraphgraph test.

Any and all comments welcome.

Many thanks

The Lie Behind the Lie Detector does not address CVSA or other voice stress analysis techniques. However, as I've mentioned before on this message board, the behavioral countermeasures described in Chapter 4 of The Lie Behind the Lie Detector may be helpful for passing a voice stress analysis "test," too.

The polygraph purports to detect deception by comparing physiological measures as respiration, heart rate and blood volume, and perspiration as an examinee answers a series of questions. Voice stress tests purport to detect deception by analyzing subtle changes in the voice that are imperceptible to the human ear.

Neither voice stress "tests" nor polygraph "tests" have any scientific basis. In both cases, the machine is essentially an interrogational prop used to dupe the gullible into making admissions/confessions. The so-called National Institute of Truth Verification, which markets CVSA, has even admitted in federal court that their device "is not capable of lie detection."

For more about voice stress analysis, see the CVSA and other Voice Stress Analysis Applications forum on this message board. In addition, if you'd like to receive a PDF file with the CVSA operator's manual chapter on pre-employment testing, e-mail me at maschke@antipolygraph.org or give me your e-mail address through a private message on this board, and I'll be happy to send it along.