Can rats show regret and, if so, how would we know?
Neuroscientists at the University of Minnesota say they do and it's intriguing because regret is a cognitive behavior thought to be uniquely and fundamentally human.
"Regret is the recognition that you made a mistake, that if you had done something else, you would have been better off," said A. David Redish, Ph.D., a professor of neuroscience in the University of Minnesota. "The difficult part of this study was separating regret from disappointment, which is when things aren't as good as you would have hoped. The key to distinguishing between the two was letting the rats choose what to do."