Abstract
Substantial correlational evidence exists suggesting a critical role for prefrontal regions in honest and dishonest behavior, but causal evidence specifying the nature of this involvement remains absent. Here we show using the lesion method that damage to the human dorsolateral prefrontal cortex (DLPFC) decreased the effect of honesty concerns on behavior in economic games that pit honesty motives against self-interest, but did not affect decisions where honesty concerns were absent. These results point to a causal role for DLPFC in enabling honest behavior.
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