An Analysis of Voice Responses for the Detection of Deception.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1994
- Accession Number
- ADA298417
Entities
People
- Andrew B. Dollins
- Victor L. Cestaro
Organizations
- United States Department of Defense