Device: Computer Voice Stress Analyzer^®(CVSA^®)
Manufacturer: The National Institute for Truth Verification (NITV), West Palm Beach, FL
Date Introduced: March, 1988. Digital version introduced April, 1997
Number of Known Law Enforcement Users: 1,700 + federal agencies & U.S. Military
Price: $9,995.00
Cost and Length of Training: $1,440.00 per student. 6 days. Re-certification required every 3 years.
Voice: 561-798-6280
Fax: 561-798-1594
Website:www.cvsa1.com                                                                                                              Comments: This system was developed from the original PSE and has evolved over the years from an analog to a digital system which is loaded into a notebook computer or the military-version TOUGHBOOK or the Sony Viao hand-held version. An independent survey commissioned by the U.S. Military's Special Operation's Command of law enforcement agencies utilizing the CVSA produced a perceived accuracy rate of 92%. It is the only voice stress analyzer whose accuracy and ease of use has allowed it to be widely accepted and utilized in both the law enforcement and the U.S. military. Note: Both the West Palm Beach Police Dept. and Palm Beach Co. Sheriff's Office use the CVSA.

Device: VSA® Mark 2000
Manufacturer: CCS International, New York City, NY
Date Introduced: June, 1978.
Number of Known Law Enforcement Users: 0
Price: $11,500.00
Cost and Length of Training: A training manual is provided with the purchase.
Voice: 212-557-3040
Fax: 212-983-1278
Comments: Sold mostly by catalog to novices. Company ran into difficulty after their outlets, the Spy Shops, were raided by federal agents.

Device: Truster/TrusterPro/Vericator/LVA & 'V'
Manufacturer: Nemesysco, Israel. Sold under various names & by various companies. LVA & TiPi are sold by V.
Date Introduced: February, 1997. Updated and reintroduced in 2001 as the LVA 6.50 and TiPi 6.40
Number of Known Law Enforcement Users: 1
Price:$29.99,$150.00/ $1,500.00/ $2,500.00/$9,500.00, $16,000.00
Cost and Length of Training: Manual is provided with purchase
Voice: 972-55-746-019, 516-625-5787
Fax: 972-894-1783, 561-625-0988  
Comments: On their Web Site under ‘Hot Press Release’ the manufacturer states that the Truster was used to analyze President Clinton’s statement made on January 26, 1988 in which Mr. Clinton denied having sex with Monica Lewinsky. The Truster found that Mr. Clinton was telling the truth. In light of his later admissions, it appears that the Truster was incorrect. Other reviews of the Truster have found the same results. Recently the rights to market the Truster in the U.S. have been purchased by several different companies and it is being marketed under several different names as “The latest in lie detection/emotion detection technology” and “The DNA of thought.” Nemesysco also sells a "Love Detector".

Device: Psychological Stress Evaluator 5128 (PSE)
Manufacturer: Dektor, Lansdale, PA
Date Introduced: January, 1970
Number of Known Law Enforcement Users: 1
Price:$6,500.00
Cost and Length of Training: $1,400.00 per student. 7 days. no re-certification required.
Voice: 215-631-1448
Fax: 215-631-1449
Comments: This is the name of both the original company and the original voice stress analyzer, but that's where the similarities end. In its current configuration, this PSE appears to be primitive.  It appears to require the examiner to record the test and then to go back and manually produce a chart from each response (this adds 20-30 minutes. to each test). From the literature it also appears that only one pattern is displayed on the screen at a time. The examiner must then analyze each response individually- light years behind today's technology. The PSE is sold mostly to P.I.'s. Note: The Lansdale Police Department uses the CVSA.

Device: Baker DVSA
Manufacturer: The Baker Group, Cape Canaveral, FL
Date Introduced: June, 2002
Number of Known Law Enforcement Users: less than 10
Price: $5,995.00 (Software only) to $9,995.00
Cost and Length of Training: $1,000.00 to $1,250.00 per student. 5 days. Re-certification required annually.
Voice: 321-799-3634
Fax: 321-799-3634
Comments: This system is remarkably similar to the Diogenes Lantern.  Gary Baker, a P.I. that formerly taught for The Diogenes Group, left the company in 2002 and introduced his own system, the Baker DVSA.  From the literature, the system appeared to be a very comprehensive and up-to-date VSA.  However, after a careful analysis and rigorous testing of the Baker DVSA, it was determined that the literature was very misleading and the system appears to be simply a copy of the old Diogenes Lantern (formerly Verimetrics) with a few cosmetic changes.  This system also requires periodic re-licensing of the software which is sold at an additional cost.  A number of law enforcement agencies have traded in their Baker DVSA's for the CVSA. Sold mostly to P.I.'s.