Accession Number : ADA330186

Title :   Instrumentation for Presenting a Known Standard Signal to the GSR Channel for Assessing Response Characteristic of Selected Polygraph Instruments.

Descriptive Note : Final rept. Apr 96-May 97,

Corporate Author : DEPARTMENT OF DEFENSE POLYGRAPH INST FORT MCCLELLAN AL

Personal Author(s) : Cestaro, Victor L.

PDF Url : ADA330186

Report Date : MAY 1997

Pagination or Media Count : 15

Abstract : Anecdotal evidence suggested that signals recorded using computerized polygraph instruments with the galvanic skin response (GSR) channel set in the manual mode are substantially different from those recorded with the instrument set in the automatic mode. This had been difficult to confirm since equipment was not available that would generate continuously variable resistance signals of known shape, magnitude, and frequency. Such a device was conceptualized, designed, constructed, tested, and aligned in the laboratory using readily available electronic components. The response characteristics of various computerized polygraph instruments were subsequently analyzed using the device. Results confirmed the verbal reports of differences between signal characteristics in the manual and automatic modes.

Descriptors :   *LIE DETECTORS, DATA BASES, RESISTANCE, ELECTRONIC EQUIPMENT, VARIABLES, RESPONSE, SIGNALS, PATTERN RECOGNITION, MANUAL OPERATION, CONTINUITY, AUTOMATIC, VERBAL BEHAVIOR, GALVANIC SKIN RESPONSE.

Subject Categories : Psychology
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE