Accession Number : ADA318988

Title :   Test of a Mock Theft Scenario for Use in the Psychophysiological Detection of Deception: I.

Descriptive Note : Final rept. Jan-May 96,

Corporate Author : DEPARTMENT OF DEFENSE POLYGRAPH INST FORT MCCLELLAN AL

Personal Author(s) : Ingram, Eben M.

PDF Url : ADA318988

Report Date : MAY 1996

Pagination or Media Count : 37

Abstract : The Zone Comparison Test (ZCT), a psychophysiological detection of deception (PDD) test, was administered to 20 subjects who were programmed to be deceptive or non-deceptive. This pilot study was designed to determine the effectiveness of the coin theft as a mock crime scenario for laboratory tests with the ZCT. The scenario instructions and pretest were videotaped. The test questions were presented using digitized voice. PDD tests were blind-evaluated by two independent scorers using the 3 position, ZCT scoring method. The frequencies of accurate determinations were compared using proportionality tests. The scorers rendered a decision in 62% of the cases, and were unable to reach a decision (inconclusive calls) in 38% of the cases. When inconclusives were excluded, the average accuracy was 84%, significantly better than chance (p < .05). Neither scorer achieved an accuracy rate better than chance level. Interrater agreement was found to be nonsignificant (Kappa for multiple raters, p > .05). Despite the high accuracy rate found when inconclusives were excluded, the inconclusive rate and low interrater agreement rates suggest that this is not an effective laboratory mock crime procedure.

Descriptors :   *SPEECH ANALYSIS, *PSYCHOPHYSIOLOGY, *LIE DETECTORS, SCENARIOS, ACCEPTANCE TESTS, COMPARISON, STRESS(PSYCHOLOGY), STRESS(PHYSIOLOGY), PILOT STUDIES, DECEPTION, VOICE COMMUNICATIONS, REACTION(PSYCHOLOGY), CRIMINAL INVESTIGATIONS, THEFT, TEST CONSTRUCTION(PSYCHOLOGY), GALVANIC SKIN RESPONSE, VIDEO TAPE RECORDING.

Subject Categories : Psychology

Distribution Statement : APPROVED FOR PUBLIC RELEASE