"Changing the message from 'Wash Your Hands to Protect Yourself' to 'Wash Your Hands to Protect Your Patients,' the study found, could motivate some doctors and nurses to wash their hands more frequently." —I guess. Or, you know, they could just start putting doctors who don't wash their hands on a month's unpaid leave. OR! They could forcibly graft a nice hospital-acquired staph infection onto their faces maybe. I don't know: if doctors aren't getting the practice of washing hands between patients, should they even be doctors? Sorry, I know all workplace best practices are hard! But this question of "motivation" seems absurd.
Carrot or the Stick