title: Detection of concealed information: combining a virtual mock crime with a P300-based Guilty Knowledge Test.
abstract: The present study examined the detection of concealed information by combining a virtual mock crime with a P300-based Guilty Knowledge Test (GKT). Thirty-eight male participants were assigned to one of two groups: a guilty group that committed a mock crime to conceal a lost roll of bills in a computer simulation of a virtual library and an innocent group that was free from concealed information. Remarkably, the guilty group reacted with stronger P300 peak amplitudes to crime-relevant than to irrelevant stimuli, whereas the innocent group had similar P300 responses between crime-relevant and irrelevant stimuli. Deception-related cognitive activity based on P300 was revealed as a valid marker to differentiate between guilty and innocent. This is a highly empirical study combining a virtual mock crime with a P300-based GKT to detect deception. These results may be applied to a variety of areas dealing with not only forensic investigation but also health and medical research concerning deception as a symptom.
authors.affiliation: Department of Psychology, Chung-Ang University, Seoul, Korea.
authors.forename: Jinsun
authors.initials: J
authors.lastname: Hahm
authors.forename: Hyung Ki
authors.initials: HK
authors.lastname: Ji
authors.forename: Je Young
authors.initials: JY
authors.lastname: Jeong
authors.forename: Dong Hoon
authors.initials: DH
authors.lastname: Oh
authors.forename: Seok Hyeon
authors.initials: SH
authors.lastname: Kim
authors.forename: Kwee-Bo
authors.initials: KB
authors.lastname: Sim
authors.forename: Jang-Han
authors.initials: JH
authors.lastname: Lee
mesh_terms: D000328:Adult; D001364:Awareness / Q000502:physiology*; D002540:Cerebral Cortex / Q000502:physiology; D003198:Computer Simulation; D008192:Deception; D004569:Electroencephalography; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005583:Fourier Analysis; D006167:Guilt; D006801:Humans; D008297:Male; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D013800:Theft / Q000523:psychology*; D014584:User-Computer Interface; D055815:Young Adult