Accession Number : ADA318986

Title :   Effectiveness of Detection of Deception Examinations Using the Computer Voice Stress Analyzer.

Descriptive Note : Final rept. Feb 95-Nov 96,

Corporate Author : DEPARTMENT OF DEFENSE POLYGRAPH INST FORT MCCLELLAN AL

Personal Author(s) : Janniro, Michael J. ; Cestaro, Victor L.

PDF Url : ADA318986

Report Date : NOV 1996

Pagination or Media Count : 26

Abstract : The accuracy of the Computer Voice Stress Analyzer (CVSA) instrument and associated processes for the detection of deception was assessed using a mock theft scenario. One hundred nine subjects were randomly assigned to two groups and given detection of deception examinations using a CVSA instrument. Subjects in one group were programmed deceptive and participated in taking $100 from a metal box located in a scenario room. The non-deceptive group did not participate in the scenarios nor did they have knowledge of the mock theft. Four trained and certified CVSA examiners conducted the examinations using a CVSA technique called the Modified Zone of Comparison test. Test chart evaluators, who had not taken part in the study and who were blind to subject programming, obtained an overall accuracy of 49.8% (z = .05, p = .96). Administering examiners correctly identified 53 of 109 (48.6%) subjects as either deceptive or non-deceptive (z = - .21, p = .84). More deceptive subjects were correctly identified by examiners than non-deceptive subjects (32 of 55 vs. 21 of 54). However, decisions were not significantly different from chance in either case.

Descriptors :   *SPEECH ANALYSIS, *LIE DETECTORS, ACCEPTANCE TESTS, COMPARISON, STRESS(PSYCHOLOGY), STRESS(PHYSIOLOGY), ACCURACY, COMPUTER AIDED DIAGNOSIS, QUESTIONNAIRES, PERCEPTION(PSYCHOLOGY), DECEPTION, VOICE COMMUNICATIONS, REACTION(PSYCHOLOGY), PSYCHOPHYSIOLOGY, THEFT, TEST CONSTRUCTION(PSYCHOLOGY), GALVANIC SKIN RESPONSE.

Subject Categories : Psychology

Distribution Statement : APPROVED FOR PUBLIC RELEASE