Department
of Defense Survey
A Department of Defense survey, published on March 30, 2007, surveyed U.S. law enforcement professionals on their experiences using the CVSA® (Computer Voice Stress Analyzer) and confirmed that “the CVSA is a useful tool.” Respondents represented a broad cross-section of U.S. law enforcement and brought the following qualifications:
- 1,497 combined years of police experience
- 500 combined years of CVSA® experience
- 14,629 total CVSA® examinations conducted in their careers
Key findings from the survey include
- About 86% of respondents rated the CVSA® as “Very” or “Extremely” effective in detecting stress.
- 84% found their initial training from NITV Federal Services to be “Very” or “Extremely” effective, with no respondents rating it as “not effective” or “slightly effective.”
- Respondents indicated that 75% of cases where CVSA® detected deception were confirmed by obtaining a confession or admission from the subject.
- The CVSA® was cited for having “a remarkably low error rate,” with respondents reporting a false positive or false negative rate of only 0.4% (less than 1%). (Note: These findings reflect the earlier CVSA® model; the updated CVSA®III with FACT Scoring has shown even greater accuracy in reducing false results.)
In conclusion, the survey states
‘’The majority of respondents find the CVSA to be a useful tool, highlighting its ease of use, affordability, timeliness, and effectiveness in securing confessions from guilty subjects. It appears highly beneficial in resolving cases.”
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