Detection of concealed information: combining a virtual mock crime with a P300-based Guilty Knowledge Test.
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.
Hahm
Jinsun
J
Department of Psychology, Chung-Ang University, Seoul, Korea.
Ji
Hyung Ki
HK
Jeong
Je Young
JY
Oh
Dong Hoon
DH
Kim
Seok Hyeon
SH
Sim
Kwee-Bo
KB
Lee
Jang-Han
JH
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