I think that we should all aspire to be better than rats.
Rats free each other from traps, then share chocolate
Or, to phrase in terms I use, they delayed their consumption in order to alleviate distress to their fellows
Rats free each other from traps, then share chocolate
The finding suggests the common pest shows a level of empathic behaviour previously thought unique to primates.
Inbal Ben-Ami Bartal and Peggy Mason at the University of Chicago housed 60 rats in pairs. Two weeks later, one of each pair was placed in a plastic trap that could be opened if the other nudged the door with its snout.
The free rats showed signs of distress at their cage-mates' predicament, says Bartal. After 12 days of practice, 77 per cent of them learned how to open the door and liberate the trapped rat. In control experiments featuring an empty trap, or a trap containing a toy mouse, just 12 per cent of rats learned how to open the door.
To see how far they could push this empathy, the researchers gave the free rats a tempting alternative. "We pitted chocolate against liberating a trapped rat," says Bartal. The free rat was confronted with a trap restraining their cage-mate and another harbouring a tasty chocolate treat. Which would they open first?
On average, the free rats were as quick to free their cage-mate as to liberate the chocolate. In a control experiment involving the chocolate trap and an empty trap, free rats opened the chocolate trap more swiftly, on average.
although the liberator could choose to eat all the chocolate before freeing their cage-mate, they were more likely to share.
Or, to phrase in terms I use, they delayed their consumption in order to alleviate distress to their fellows