Dorsolateral prefrontal cortex specifically processes general - but not personal - knowledge deception: Multiple...

Area of Science:

• Neuroscience
• Cognitive Psychology
• Psychiatry

Background:

• Detecting deception is crucial in legal, moral, and clinical settings.
• Limited experimental data exists on the neural mechanisms underlying different types of lies.

Purpose of the Study:

• To investigate the neural substrate of deception using transcranial direct current stimulation (tDCS).
• To assess the influence of modulating dorsolateral prefrontal cortex (DLPFC) function on various types of lies.

Main Methods:

• tDCS (anodal and sham) was applied to 20 healthy volunteers.
• Participants completed the Guilty Knowledge Task and Visual Attention Task before and after stimulation.
• Reaction times (RTs) and accuracy were measured for truthful and deceptive responses.

Main Results:

• Baseline RTs were longer for lies than truthful responses.
• Anodal tDCS significantly decreased RTs for general knowledge lies but not personal information lies.
• tDCS did not affect performance on the Visual Attention Task.

Conclusions:

• DLPFC modulation via tDCS specifically influences deception related to general knowledge.
• Deception involving personal information may rely on different cortical networks.
• Multiple neural networks are likely involved in different types of deception.