Accession Number : ADA298599

Title :   A Comparison of Signals from Two Occlusive Cuff Cardiovascular Sensors Used for the Psychophysiological Detection of Deception.

Corporate Author : DEPARTMENT OF DEFENSE POLYGRAPH INST FORT MCCLELLAN AL

PDF Url : ADA298599

Report Date : JUL 1994

Pagination or Media Count : 31

Abstract : This study was designed to investigate the correlation between cardiovascular signals measured during a psychophysiological detection of deception (PDD) examination using the occlusive arm and finger cuffs. Twenty subjects completed a number search task and participated in a PDD examination where the questions addressed the number circled during the number search task. Half of the subjects circled numbers within the range of the PDD questions and half circled numbers outside of the range. Dependent measures included the time-locked amplitudes of electrophysiologic signals measured from the occlusive arm and finger cuffs. The degree of correlation between these measures was assessed. The Pearson correlations between the right finger cuff and the left arm cuff were 0.90 or higher for 379 of 529 (72%) data pairs. The correlations between the left finger cuff and the left arm cuff were equal to or greater than 0.90 for 219 of 523 (42%) data pairs. These results, and practical considerations, suggest that the occlusive finger cuff tested (Lafayette Model 7620) is not a viable alternative to the traditional arm cuff. A finger cuff may, however, be more sensitive to peripheral blood volume changes than the arm cuff and a less problematic design should be investigated.

Descriptors :   *DETECTION, *CARDIOVASCULAR SYSTEM, *PSYCHOPHYSIOLOGY, DETECTORS, COMPARISON, CORRELATION, SIGNALS, SEARCHING, DECEPTION, BLOOD VOLUME, FINGERS.

Subject Categories : Psychology
      Anatomy and Physiology
      Miscellaneous Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE