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Sensitivity to fairness and the gut microbiome

Taking pro- and prebiotics affects levels of altruistic punishment in ultimatum game players. Participants who took supplements were more likely to reject unfair offers, with those having a high Firmicutes-to-Bacteroidetes ratio seeing the greatest changes.

SourcePNAS Nexus·JournalPNAS Nexus·DateMay 14, 2024

Are we born with a moral compass?

Researchers found that infants can punish antisocial behavior exhibited by a third party, indicating an intrinsic motivation for morality. The study's findings suggest that humans may have acquired behavioral tendencies toward moral behavior during evolution.

SourceOsaka University·JournalNature Human Behaviour·TypeExperimental study·DateJun 9, 2022

Past suffering can affect future praise

A study by the University of Missouri found that people are more likely to praise someone for good deeds if they know the person has also faced suffering earlier in life. This discovery sheds light on how humans process and react to positive behaviors, such as giving praise.

SourceUniversity of Missouri-Columbia·JournalJournal of Experimental Social Psychology·TypeExperimental study·DateSep 28, 2021

Pinpointing punishment

A new study has pinpointed the dorsolateral prefrontal cortex (DLPFC) as a critical brain region responsible for coordinating punishment decisions made by judges and juries. The DLPFC integrates information from other parts of the brain to determine punishment, with disruption leading to reduced punishments for morally responsible agents.

SourceHarvard University·JournalNeuron·DateSep 16, 2015