Tiny brain zap nudges people toward generosity, study finds

In a University of Zurich study, 44 volunteers received non-invasive electrical stimulation to the frontal and parietal brain areas while deciding how to split money. When stimulated simultaneously, participants showed a modest but consistent increase in generosity toward an anonymous partner, though effects were short-lived and would require repeated sessions for longer-term change. Researchers say this demonstrates a causal link between these networks and altruistic choices and could inform treatment of social-behavior disorders, with ethical safeguards in place.