A novel Dual Probe complex trial Protocol for detection of concealed information

Elena Labkovsky, J. Peter Rosenfeld*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

In simply guilty (SG), countermeasure-using guilty (CM), and innocent (IN) subjects, a new concealed information test, the P300-based Dual Probe Complex Trial Protocol was tested in a mock crime scenario. It combines an oddball protocol with two stimuli (probe, irrelevant) and another with three stimuli (probe, irrelevant, target) into one trial, doubling detected mock crime information per unit time, compared to previous protocols. Probe-irrelevant amplitude differences were significant in SG and CM, but not IN subjects. On a measure from both two and three stimulus protocol parts of the Dual Probe Complex Trial Protocol trial, accuracy was 94.7% (based on a .9 bootstrap criterion). The criterion-independent area (AUC) under the receiver operating characteristic (from signal detection theory) measuring SG and CM versus IN discriminability averaged .92 (in a range of 0.5-1.0). Countermeasures enhanced irrelevant (not probe) P300s in CM groups.

Original languageEnglish (US)
Pages (from-to)1122-1130
Number of pages9
JournalPsychophysiology
Volume51
Issue number11
DOIs
StatePublished - Nov 1 2014

Keywords

  • Concealed information tests
  • Credibility assessment
  • Event-related potentials
  • Guilty knowledge tests
  • Lie detection
  • P300
  • Psychophysiological detection of deception

ASJC Scopus subject areas

  • Neuroscience(all)
  • Neuropsychology and Physiological Psychology
  • Experimental and Cognitive Psychology
  • Neurology
  • Endocrine and Autonomic Systems
  • Developmental Neuroscience
  • Cognitive Neuroscience
  • Biological Psychiatry

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