NCJ Number
100402
Journal
Journal of Police Science and Administration Volume: 13 Issue: 4 Dated: (December 1985) Pages: 283-294
Date Published
1985
Length
12 pages
Annotation
This study examined the validity and reliability of the polygraph results and the usefulness of the individual physiological components of the polygraphic instrument.
Abstract
It also considered the relationship between the type of information being sought and the intensity of subjects' reactions to the testing. The study had two parts. In the first part, 4 full-time polygraphists with at least 2 years of testing experience rated 60 criminal cases from the files of a large industrial security organization. They rated the polygraphs at 6-week intervals. They considered four versions of each polygram: a complete view consisting of all three tracings, the galvanic skin response (GSR) only, the respiratory tracing only, and the cardiovascular activity tracing only. In the second part, questionnaires were mailed to 200 members of the American Polygraph Association. Forty-seven responses were received. Results showed that the subjects' reactivity was unrelated to whether the charge was a misdemeanor or a felony. Cardiovascular activity was the most valid component, followed by GSR and respiration. Three components produced more valid determinations than any single component. Additional findings and study limitations are discussed. Tables and 33 references.