Voice Stress Analysis / Detection vs. Polygraph
The Polygraph has become a household term as it has enjoyed wide exposure in film and TV in comparison to voice stress analysis. Media prefer using the “old” technology of Polygraphs as it uses an analogue format that is more visual with needle and ink printing / display.
Polygraph technology is over 80 years old and our experience is that most of the Industry is moving away from the Polygraph testing method to the digital Voice Stress Analysis method as it is more hygienic, less intimidating and more subject friendly.
See some of the factual difference between the two methods:
VOICE STRESS ANALYSIS (VSA)
Measures the Autonomic Nervous System (ANS)
Measures the Central Nervous System (CNS)
Intrusive physiological attachments (painful at times)
Old science (80 years)
Modern science with space age technology.
ONLY Countermeasure is Silence
Non Hostile Techniques
30-60% “Inconclusive” Results (Examiner dependent)
No “Inconclusive” Results
Drugs, Age & Health can skew results
Not affected by Alcohol, Drugs, Age or Health
“YES” & “NO” Answers required
Narrative answers acceptable
Must sit motionless
Totally Analogue or with Computer to display Charts
Totally Digital (64 bit). Proprietary algorithms.