Accession Number:

ADA305954

Title:

Cardiovascular Indices of Guilty Knowledge.

Descriptive Note:

Final rept. May 93-Jun 94,

Corporate Author:

MILLER ERGONOMICS LAKESIDE CA

Personal Author(s):

Report Date:

1994-06-01

Pagination or Media Count:

63.0

Abstract:

The project attempted to determine, through a multivariate analysis of cardiovascular function using impedancecardiography, what pattern of autonomic activity was reliably associated with concealed knowledge. The hypothesis was that h1 reliable, meaningful changes in the autonomic control of cardiovascular function are associated with concealed knowledge. The subjects were ten non-obese Thales with no prior polygraph experience. Four trials of six questions each were used. All trails were constructed like the Numbers Test Furedy and Ben-Shakar, 1991. The first trial was based upon playing cards. The second through fourth trials involve the subjects year, month and day of birth, respectively. Digitized physiological data were acquired for 30 sec following each stimulus. The breathing pattern, skin conductance responses, electrocardiogram, impedance cardiogram and fingertip pulse pressure were recorded. The SCR-based detection rates for lies, 62.5 and 67.5, were well above the expected random guessing rate of 20. These relatively high rates suggested that different autonomic responses were associated with lies than with true responses. In turn, this observation suggested that differences in cardiovascular dynamics between lies and true responses may have been triggered by autonomic changes.

Subject Categories:

  • Anatomy and Physiology
  • Medicine and Medical Research
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE