The truth about lying: Inhibition of the anterior prefrontal cortex improves deceptive behavior

Ahmed A. Karim, Markus Schneider, Martin Lotze, Ralf Veit, Paul Sauseng, Christoph Braun, Niels Birbaumer

Research output: Contribution to journalArticle

Abstract

Recent neuroimaging studies have indicated a predominant role of the anterior prefrontal cortex (aPFC) in deception and moral cognition, yet the functional contribution of the aPFC to deceptive behavior remains unknown. We hypothesized that modulating the excitability of the aPFC by transcranial direct current stimulation (tDCS) could reveal its functional contribution in generating deceitful responses. Forty-four healthy volunteers participated in a thief role-play in which they were supposed to steal money and then to attend an interrogation with the Guilty Knowledge Test. During the interrogation, participants received cathodal, anodal, or sham tDCS. Remarkably, inhibition of the aPFC by cathodal tDCS did not lead to an impairment of deceptive behavior but rather to a significant improvement. This effect manifested in faster reaction times in telling lies, but not in telling the truth, a decrease in sympathetic skin-conductance response and feelings of guilt while deceiving the interrogator and a significantly higher lying quotient reflecting skillful lying. Increasing the excitability of the aPFC by anodal tDCS did not affect deceptive behavior, confirming the specificity of the stimulation polarity. These findings give causal support to recent correlative data obtained by functional magnetic resonance imaging studies indicating a pivotal role of the aPFC in deception.

Original languageEnglish
Pages (from-to)205-213
Number of pages9
JournalCerebral Cortex
Volume20
Issue number1
DOIs
Publication statusPublished - Jan 2010

Fingerprint

Prefrontal Cortex
Deception
Guilt
Neuroimaging
Cognition
Reaction Time
Inhibition (Psychology)
Healthy Volunteers
Emotions
Magnetic Resonance Imaging
Skin
Transcranial Direct Current Stimulation

Keywords

  • Frontal cortex
  • Lie detection
  • Moral cognition
  • Neuroethics
  • Skin-conductance response (SCR)
  • Transcranial direct current stimulation (tDCS)

ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Cellular and Molecular Neuroscience

Cite this

Karim, A. A., Schneider, M., Lotze, M., Veit, R., Sauseng, P., Braun, C., & Birbaumer, N. (2010). The truth about lying: Inhibition of the anterior prefrontal cortex improves deceptive behavior. Cerebral Cortex, 20(1), 205-213. https://doi.org/10.1093/cercor/bhp090

The truth about lying : Inhibition of the anterior prefrontal cortex improves deceptive behavior. / Karim, Ahmed A.; Schneider, Markus; Lotze, Martin; Veit, Ralf; Sauseng, Paul; Braun, Christoph; Birbaumer, Niels.

In: Cerebral Cortex, Vol. 20, No. 1, 01.2010, p. 205-213.

Research output: Contribution to journalArticle

Karim, AA, Schneider, M, Lotze, M, Veit, R, Sauseng, P, Braun, C & Birbaumer, N 2010, 'The truth about lying: Inhibition of the anterior prefrontal cortex improves deceptive behavior', Cerebral Cortex, vol. 20, no. 1, pp. 205-213. https://doi.org/10.1093/cercor/bhp090
Karim, Ahmed A. ; Schneider, Markus ; Lotze, Martin ; Veit, Ralf ; Sauseng, Paul ; Braun, Christoph ; Birbaumer, Niels. / The truth about lying : Inhibition of the anterior prefrontal cortex improves deceptive behavior. In: Cerebral Cortex. 2010 ; Vol. 20, No. 1. pp. 205-213.
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