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Concealed identity information detection with pupillometry in rapid serial visual presentation.

Ivory Y Chen1, Aytaç Karabay1, Sebastiaan Mathȏt1

  • 1Department of Experimental Psychology, University of Groningen, Groningen, the Netherlands.

Psychophysiology
|July 22, 2022
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Summary

Researchers explored using pupil size changes to detect concealed identity information with a rapid serial visual presentation (RSVP) task. While pupil dilation occurred for real names, the method requires further development for reliable individual detection.

Keywords:
RSVPattentionconcealed information detectionpupil dilationpupillometry

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Area of Science:

  • Psychology
  • Neuroscience
  • Forensic Science

Background:

  • The concealed information test (CIT) detects hidden information via physiological responses.
  • Countermeasures can undermine CIT accuracy by interfering with responses.
  • Rapid serial visual presentation (RSVP) shows promise in mitigating countermeasures.

Purpose of the Study:

  • To investigate pupillometry as a measure for detecting concealed identity information using RSVP.
  • To assess the feasibility of using pupil size, an easily measurable physiological response, for CIT applications outside the lab.

Main Methods:

  • Participants underwent an RSVP task presenting their real name, a fake name, and control names.
  • Pupil size was recorded during the RSVP task to detect responses to concealed identity information.
  • Two studies were conducted, with the second preregistering the methodology for proof-of-concept replication.

Main Results:

  • Pupil dilation was observed in response to participants' real names compared to control names.
  • The pupil dilation effect was qualitatively present but not statistically significant for most individuals.
  • The RSVP task with pupillometry detected concealed identity information at a group level.

Conclusions:

  • Pupillometry combined with RSVP shows potential for detecting concealed identity information.
  • Current methods are effective at a group level but require further refinement for reliable individual detection.
  • Future research should focus on enhancing the sensitivity and reliability of pupillometry-based CIT for individual assessment.