Our brains respond less to ill-gotten gains

Researchers have identified a neural process that dampens the appeal of profiting at other people’s expense. It may explain why most people are reluctant to profit from illegal activities.

"When we make decisions, a network of brain regions calculates how valuable our options are," explains lead author Dr Molly Crockett, from the University of Oxford. "Ill-gotten gains evoke weaker responses in this network, which may explain why most people would rather not profit from harming others. Our results suggest the money just isn’t as appealing."

The team, who did the research at the UCL Wellcome Centre for Neuroimaging, scanned volunteers’ brains as they decided whether to anonymously inflict pain on themselves or strangers in exchange for money. 

Twenty-eight pairs of participants were randomly assigned to be either the ‘decider’ or the ‘receiver’ of an electric shock. 

The researchers found:

In a follow-up study, participants made moral judgements about fictional decisions to harm others for profit, and considered similar trials where people inflicted pain for just a small amount of money to be the most blameworthy.

Taken together, the findings suggest the LPFC was assessing blame. When people refused to profit from harming others, this brain region was communicating with the striatum, suggesting that neural representations of moral rules might disrupt the attraction of ill-gotten gains encoded in the striatum. 

"Our findings suggest the brain internalises the moral judgments of others, simulating how much others might blame us for potential wrongdoing, even when we know our actions are anonymous," says Dr Crockett.

The findings are published in Nature Neuroscience