What's the appeal of digital badges? I used to think that only a crazy person would be motivated to exercise just to move some electrons around on their smartphone screen. My phone would notify me that a new challenge was available each month, and I would routinely ignore it. I felt no pain or consternation about this -- in fact, I never gave it a second thought, or never notice the challenge at all. But for the past few months it seems that I'm among those who increase their activity level just because their iPhone tells them to (my latest badges shown above). Why does this seemingly stupid behavior-change strategy work, and why did it start working for me when it didn't help me before? First, it's important to know that rewards do motivate behavior. In a previous post on behaviorism I provided some background on how this works by training the Intuitive Mind. Two Minds Theory posits that the final stage before a behavior is produced by the Intuitive Mind (after proc...