We all know bad manners are toxic. But new research now shows that bad manners can kill.
In this study, when doctors spoke rudely to their staff, both accuracy and performance suffered. The medical teams exposed to bad behavior and nasty comments demonstrated poorer diagnostic and procedural performance than those who were not exposed to incivility.

As the lead researchers commented: "Relatively benign forms of incivility among medical staff members—simple rudeness—have robust implications on medical team collaboration processes and thus on their performance as a team."

Rudeness and lack of kindness undermine people's ability to think clearly and make good decisions. It steals confidence and weakens motivation.

Editor's Note: On a positive note, we could assume that there is just as much power for good in simple and ordinary acts of kindness and gentleness.