about bad things that can happen in the future, like disease, it uses three principles that we know really drive your mind and your behavior. Let me explain. The first one is social incentives. In the hospital study, the medical staff could see what other people were doing. They can see the rates of the shift, the rate of the week. We're social people, we really care what other people are doing, we want to do the same and we want to do it better. This is an image from a study that we conducted, led by PhD student Micah Edelson,