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ORIGINAL ARTICLE
Year : 2019  |  Volume : 11  |  Issue : 2  |  Page : 90-94

Facial psychophysiology in forensic investigation: A novel idea for deception detection


1 Institute of Forensic Science, Gujarat Forensic Sciences University, Gandhinagar, Gujarat, India
2 Institute of Behavioral Science, Gujarat Forensic Sciences University, Gandhinagar, Gujarat, India

Correspondence Address:
Dr. Selwin Gabriel Samuel
UQ Center for Clinical Research, Brisbane, Queensland, Australia.

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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jfo.jfds_49_19

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Background: Polygraph or lie detection test has been used since early 90s as an effective method in forensic investigations. However, polygraph does not have a stand-alone value in legal forums. Any novel scientific addition can strengthen the credibility of the polygraph. Aim: This study aims to determine whether the deception could be detected with the help of polygraph where electromyography (EMG) readings of the masseter muscle, along with electrocardiography and galvanic skin response, were considered. Materials and Methods: The study was conducted on 14 participants in a well-established research setup. Card Test and Affirmative Test were performed on participants and the readings were critically analyzed. Results: In both the tests performed, the deceptions were easily detected once and rarely detected twice. In some cases, the deceptions were undetected. Conclusion: The result indicated with minimal credence that EMG helps in detecting deception. The accuracy of detection however can be confirmed only after an extensive research.


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