The Polygraph and Lie Detection: A Case Study

Aabad Ayoub, Farwa Rizvi, Saba Akram, Muhammad A. Tahir

Abstract


There are many cases in which physical evidence is missing. In such instances, a polygraph is a useful technique to determine the examinee’s truthfulness or deception. A polygraph is an instrument that monitors the changes inside the body. The present study was conducted to determine the truthfulness of the victim and suspects in a hand chopping case. In the present study, integrated zone comparison technique (IZCT) and forensic assessment interview (FAINT) were used to test the suspects and the victim. Computerized ASIT Algorithm and weighted scoring systems were used in IZCT and FAINT, respectively. Two suspects and one victim were referred for polygraph examination. Electro-dermal activity sensors were placed on the victim’s forehead as he did not have arms, and a cardio cuff was placed on his left leg. During the initial interview, the victim alleged that his hands were put forcibly into a machine. All the suspects were also tested, and the victim was found to be deceptive. He later confessed that his hands were not put forcibly into machine. After testing, it was found that all the suspects were truthful.


Keywords


Forensic Sciences, Integrated zone comparison technique (IZCT), Forensic Assessment interview technique (FAINT), ASIT Polysuite Algorithm, Weighted Scoring

Full Text:

PDF

References


Reid JE. A revised questioning technique in lie-detection

tests. J Crim L & Criminology. 1946;37:542.

Backster C. Standardized polygraph notepack and

technique guide: Backster zone comparison technique.

Cleve Backster: New York. 1963.

Gordon NJ, Cochetti PM. The horizontal scoring system.

Polygraph. 1987;16(2):116-25.

Berntson GG, Cacioppo JT, Binkley PF, Uchino BN,

Quigley KS, Fieldstone A. Autonomic cardiac control.

III. Psychological stress and cardiac response in autonomic

space as revealed by pharmacological blockades.

Psychophysiol. 1994;31(6):599-608. https://doi.

org/10.1111/j.1469-8986.1994.tb02352.x

Kircher JC, Raskin DC. Computer methods for the psychophysiological

detection of deception. Handbook of

polygraph testing. 2002:287-326.

Stern RM, Ray WJ, Quigley KS. Psychophysiological

recording. Oxford University Press, USA; 2001.

Gordon NJ, Fleisher WL. Effective interviewing and

interrogation techniques. Academic Press; 2010.

Shaujaat, A. & Baqir, F. (2010). Translated Version

of Forensic Assessment Interview Technique. Unpublished

Gordon NJ, Mohamed FB, Faro SH, Platek SM, Ahmad

H, Williams JM. Integrated zone comparison polygraph

technique accuracy with scoring algorithms. Physiol

behav. 2006;87(2):251-4. https://doi.org/10.1016/j.

physbeh.2005.08.046

Gordon NJ, Fleisher WL. Effectiveness of the Integrated

Zone Comparison Technique (IZCT) with Various

Scoring Systems in a Mock Crime Experiment by Students.

Polygraph. 2012:5.

Patton CA. The Integrated Zone Comparison Technique;

a Field Utility Study in a Deceptive Population.

European Polygraph. 2013;7(3):113-20.

Gordon NJ, Fleisher WL, Morsie H, Habib W, Salah K.

A field validity study of the integrated zone comparison

technique. Polygraph. 2000;29(3):220-5.

Krapohl D, Gordon N, Lombardi C. Accuracy demonstration

of the Horizontal Scoring System using field

cases conducted with the Federal Zone Comparison

Technique. Polygraph. 2008;37(4):263-8.




DOI: http://dx.doi.org/10.26735/16586794.2018.008

Refbacks

  • There are currently no refbacks.




Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.