Accession Number : ADA298417

Title :   An Analysis of Voice Responses for the Detection of Deception.

Descriptive Note : Final rept. Feb 93-Jun 94,

Corporate Author : DEPARTMENT OF DEFENSE POLYGRAPH INST FORT MCCLELLAN AL

Personal Author(s) : Cestaro, Victor L. ; Dollins, Andrew B.

PDF Url : ADA298417

Report Date : JUN 1994

Pagination or Media Count : 40

Abstract : This study was designed to examine the feasibility of using audio pitch analysis and spectrum decomposition techniques to aid in the detection of deception following a numbers test. Usable audio recordings from 28 of 44 male subjects' responses during a Peak of Tension (POT) test were made while a Lafayette field polygraph was usedAo collect respiration, cardiovascular, and electrodermal responses for manual evaluation. Half of the examinees were programmed 'deceptive' and half were programmed "truthful". Off-line analysis using pitch and spectral analysis software to examine differences between truthful and deceptive "no' responses disclosed no significant differences were found between the two groups between the two groups on individual measures of pitch variation, response duration, or mean response energy. A significant concurrence rate (p < .01) was seen between decisions made by pitch/energy analysis and the examiner's decisions based on analysis of the test data. Significant differences were found between the number of correct decisions made by the examiner (79%) and by pitch/energy analysis (37%) . No significant differences were seen between the number of false positive decisions made by the examiner and by pitch/energy analysis (35% versus 29%). (AN)

Descriptors :   *SPEECH ANALYSIS, *DECEPTION, *VOICE COMMUNICATIONS, *SOUND PITCH, COMPUTER PROGRAMS, SOFTWARE ENGINEERING, PEAK VALUES, DECISION MAKING, STRESS(PSYCHOLOGY), TENSION, NERVOUS SYSTEM, SPECTRAL ENERGY DISTRIBUTION, RESPIRATION, SPECTRUM ANALYSIS, FREQUENCY DOMAIN, ACOUSTIC DATA, CARDIOVASCULAR SYSTEM, SPECTROGRAPHY, AUDIO FREQUENCY, PSYCHOACOUSTICS, REACTION(PSYCHOLOGY), PSYCHOPHYSIOLOGY, EMOTIONS.

Subject Categories : Psychology
      Voice Communications
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE