Rats prefer to help their own kind; Humans may be similarly wired -- ScienceDaily
A decade after scientists discovered that lab rats will rescue a fellow rat in distress, but not a rat they consider an outsider, new research from the University of California, Berkeley, pinpoints the brain regions that drive rats to prioritize their nearest and dearest in times of crisis. It also suggests humans may share the same neural bias.
The findings, published today, Tuesday, July 13, in the journal eLife, suggest that altruism, whether in rodents or humans, is motivated by social bonding and familiarity rather than sympathy or guilt.
"We have found that the group identity of the distressed rat dramatically influences the neural response and decision to help, revealing the biological mechanism of ingroup bias," said study senior author Daniela Kaufer, a professor of neuroscience and integrative biology at UC Berkeley.
With nativism and conflicts between religious, ethnic and racial groups on the rise globally, the results suggest that social integration, rather than segregation, may boost cooperation among humans.
