Abstract
ObjectiveQuite many studies have revealed certain brain‐process signatures indicative of subject's deceptive behavior. These signatures are neural correlates of deception. However, much less is known about whether these signatures can be modified by noninvasive brain stimulation techniques representing methods of causal intervention of brain processes and the corresponding behavior. Our purpose was to explore whether such methods have an effect on these signatures.MethodsIt is well known that electroencephalographic event‐related potential component, P300, is sensitive to perception of critical items in a concealed information test, one of the central methods in deception studies. We examined whether the relative level of expression of P300 as a neural marker of deception can be manipulated by means of noninvasive neuromodulation. We used EEG/ERP recording combined with (i) neuronavigated repetitive transcranial magnetic stimulation (rTMS) and (ii) concealed information detection test. An opportunistically recruited volunteer group of normal adults formed our experimental group.ResultsWe show that offline rTMS to dorsolateral prefrontal cortex attenuated relative P300 amplitude in response to the critical items compared to the neutral items.ConclusionNoninvasive prefrontal cortex excitability disruption by rTMS can be used to manipulate the sensitivity of ERP signatures of deception to critical items in a concealment‐based variant of lie detection test.
Highlights
The brain works differently when a person lies compared to how the brain works when this person tells the truth (Ganis et al, 2003; Langleben et al, 2005; Ganis and Keenan, 2009; Kozel et al, 2009; Jiang et al, 2013)
In one of our earlier studies (Karton and Bachmann, 2011) we explored the causal effect of manipulation of DLPFC on deception related behavior and found that repetitive offline transcranial magnetic stimulation of the righthemisphere DLPFC relatively decreased untruthful responses, whereas left-hemisphere DLPFC stimulation relatively increased lying
The present study aimed at investigating whether non-invasive brain stimulation by offline rTMS has an impact on the relative expression of the best known event related potentials (ERPs) marker of deception, the augmented P300 to critical stimuli
Summary
The brain works differently when a person lies compared to how the brain works when this person tells the truth (Ganis et al, 2003; Langleben et al, 2005; Ganis and Keenan, 2009; Kozel et al, 2009; Jiang et al, 2013). This obvious fact makes it possible to develop objective methods of deception detection based on psychophysiology and brain imaging. If a deception-related critical (probe) stimulus is presented, the P300 in response to this stimulus is enhanced compared to irrelevant stimuli (Ambach et al, 2010; Rosenfeld et al, 2013)
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