NCJ Number
86539
Journal
Security Management Volume: 26 Issue: 12 Dated: (December 1982) Pages: 29-32,34-35
Date Published
1982
Length
7 pages
Annotation
This article discusses the mechanics of polygraph examination, use of the polygraph by private industry and Government, admissibility of polygraphy evidence in criminal trials, and future refinements of techniques.
Abstract
The polygraph measures a person's respiration, blood pressure, and perspiration. Its premise is that lying will involuntarily and inevitably lead to a quickening of the monitored physical processes. The use of the polygraph is expanding. Polygraphers regularly test individuals in such agencies as the FBI and the CIA. Polygraph examinations are cheaper and quicker than background investigations for job applicants, and many employers now use the polygraph for this reason. Approximately 6,000 polygraphers practice in the United States, administering an estimated 500,000 to 1,000,000 tests each year. The standard polygraph format is the Control Question Test. Questions are asked in a monotone, sometimes so softly that the examinee must strain to hear. Despite efforts to defend its use, controversy still surrounds the use of the polygraph in criminal trials. No State freely admits polygraph evidence in criminal cases, although about 25 do when both the prosecuting and defense attorneys agree before the testing. The American Polygraph Association cites studies indicating that polygraph accuracy rates range from 87.2 percent to 96.2 percent. Radical advances in instrumentation are not anticipated. However, refinements, such as computer analysis of polygraph charts, will probably play an increasing role in future polygraph procedures. One photograph is included.