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Group Synchronization During Collaborative Drawing Using Functional Near-Infrared Spectroscopy

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Extracting concealed information from groups.

Ewout H Meijer¹, Fren T Y Smulders, Harald L G J Merckelbach

¹Department of Clinical Psychological Science, Faculty of Psychology and Neuroscience, Maastricht University, The Netherlands. eh.meijer@maastrichtuniversity.nl

Journal of Forensic Sciences

|June 11, 2010

Summary

This study adapted the skin conductance-based Concealed Information Test (CIT) for group lie detection. Researchers successfully extracted mock terrorist attack details from a group, demonstrating CIT

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Area of Science:

Psychology
Forensic Science
Physiology

Background:

Traditional lie detection focuses on individual suspects.
Security threats often involve organized groups like terrorist networks.
Existing methods struggle to extract information collectively from groups.

Purpose of the Study:

To develop and evaluate a group-based lie detection method.
To adapt the skin conductance-based Concealed Information Test (CIT) for group information extraction.
To determine if critical information can be identified from a group of individuals aware of specific details.

Main Methods:

A mock terrorist attack scenario was created.
Twelve participants received specific, concealed information about the attack.
Each participant underwent a skin conductance-based Concealed Information Test (CIT) with attack-related questions.

Main Results:

Significant differences in skin conductance responses were observed for correct versus incorrect answer options for every question (p < 0.05).
The average skin conductance response to the correct answer option consistently differed from other options across all participants.
This indicates successful extraction of concealed information from the group.

Conclusions:

The adapted CIT can effectively extract concealed information from a group.
This method shows promise for intelligence gathering and security applications involving groups.
Group lie detection using physiological responses is feasible.