Evaluation of the Value of Physiological Cues to Determining the Salience of a Risk Factor in a Situation of Screening Polygraph Test

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Abstract

The scientific validity of polygraph testing is regularly criticized by the scientific community in view of the subjectivity of data evaluation and the unclear predictive value of the parameters obtained with the help of a polygraph. In order to clarify the contribution of the physiological cues used in identifying the salience of the topic during polygraph screening, the materials of an empirical study obtained from a sample of 67 volunteers who have a risk factor associated with forgery of documents and do not have it are presented. A psychophysiological method was used with a preliminary questionnaire about the well-being at the time of the experiment. During the paid experiment, it was proposed to forge a financial document and lie about it to a polygraph examiner, or answer questions honestly. In order to eliminate subjectivity in data evaluation, all registered signals were digitized, standardized and processed using the discriminate analysis method. At the same time, a high accuracy of the discriminant model was found (92.5%). The parameters of a short-term rise in blood pressure and changes in the electrical activity of the skin were the main variables for the classification of persons with and without a risk factor. The data obtained complement previous studies on the accuracy of the polygraph screening test, expanding the prognostic value of the length of the respiratory signal line.

General Information

Keywords: screening polygraph test, personnel screening, psychophysiological cues, assessment of the salience of information, directed-lie questions, accuracy of polygraph

Journal rubric: Methodological Problems of Legal Psychology

Article type: scientific article

DOI: https://doi.org/10.17759/psylaw.2023130207

Received: 12.07.2022

Accepted:

For citation: Kuptsova D.M., Dvoryanchikov N.V. Evaluation of the Value of Physiological Cues to Determining the Salience of a Risk Factor in a Situation of Screening Polygraph Test [Elektronnyi resurs]. Psikhologiya i pravo = Psychology and Law, 2023. Vol. 13, no. 2, pp. 82–93. DOI: 10.17759/psylaw.2023130207. (In Russ., аbstr. in Engl.)

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Information About the Authors

Darina M. Kuptsova, Department of Forensic and Clinical Psychology, Faculty of Legal Psychology, Moscow State University of Psychology & Education, Moscow, Russia, ORCID: https://orcid.org/0000-0002-6803-1984, e-mail: dary.rin@gmail.com

Nikolay V. Dvoryanchikov, PhD in Psychology, Docent, Dean, Faculty of Legal and Forensic Psychology, Moscow State University of Psychology & Education, Moscow, Russia, ORCID: https://orcid.org/0000-0003-1462-5469, e-mail: dvorian@gmail.com

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