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):

Report Date:

1996-05-01

Pagination or Media Count:

37.0

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.

Subject Categories:

  • Psychology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE