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Inhibiting self-justification for dishonesty with noninvasive brain stimulation
1Business School of Nankai University, Nankai University, Tianjin, China.
Neuroscience Letters
|March 7, 2018
Summary
This study shows that transcranial direct current stimulation (tDCS) over the right ventrolateral prefrontal cortex (VLPFC) can increase genuine honesty. By inhibiting self-justification for dishonesty, tDCS promotes more truthful behavior.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Moral Psychology
Background:
- Self-justification allows individuals to maintain a sense of honesty while acting in self-interest.
- Understanding the neural mechanisms underlying genuine honesty and dishonesty is crucial for behavioral science.
Purpose of the Study:
- To investigate whether transcranial direct current stimulation (tDCS) targeting the ventrolateral prefrontal cortex (VLPFC) can modulate genuine honesty.
- To determine if VLPFC stimulation inhibits self-justification for dishonest behavior.
Main Methods:
- 149 participants completed a die-in-a-cup task assessing honesty.
- Anodal tDCS was applied over the right VLPFC in an experimental group.
- Behavioral outcomes related to honesty and self-justification were measured.
Main Results:
- Anodal tDCS over the right VLPFC significantly increased full honesty by 35.04%.
- High claims indicative of dishonesty decreased by 21% in the tDCS group.
- The distribution of reported die rolls shifted towards full honesty, deviating from justified dishonesty benchmarks.
Conclusions:
- Stimulation of the right VLPFC via anodal tDCS enhances genuine honesty.
- This enhancement appears to operate by inhibiting the cognitive mechanism of self-justification for dishonesty.
- Findings contribute to understanding the neural basis of moral decision-making and honesty.
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