Impulsive choice and altruistic punishment are correlated and increase in tandem with serotonin depletion.
Level 2 - randomized trial
Randomized experimental trial manipulating serotonin levels in humans
PubMed 21171757 · doi:10.1037/a0019861
What was done
Researchers examined the relationship between impulsive choice and altruistic punishment using the Ultimatum Game. To test whether altruistic punishment requires self-control or is driven by impulsive emotion, they manipulated central serotonin levels via experimental depletion and measured changes in impulsive choice and altruistic punishment across participants.
What was found
Impulsive choice and altruistic punishment were positively correlated across individuals. Following serotonin depletion, both impulsive choice and altruistic punishment increased in tandem. The abstract reports no numerical values, effect sizes, or statistical significance levels.
Why it matters
This study provides evidence that altruistic punishment in economic games is linked to impulsive, emotionally driven processes rather than deliberate self-control, suggesting a shared serotonergic mechanism between impulsivity and costly punishment.
Limits
The abstract does not report sample size, participant demographics, specific depletion methods, or quantitative data. Laboratory-based bargaining paradigms may not fully reflect social punishment in complex real-world environments.
Cited by
- contradicts Research by Molly Crockett demonstrated that depleting serotonin reduces prosocial and altruistic behavior.