I was a third-year medical student at Northwestern on my ICU rotation the first time I saw a dopamine drip. The patient was pale and motionless, his blood pressure dropping by the minute despite large ...

Digital entertainment products are no longer judged only by their core feature set. In many categories, the real difference comes from how well they guide users back into the experience day after day.

A treat here and a treat there seems harmless enough. After all, what could go wrong with a little positive reinforcement for good behavior? As it turns out, quite a bit. The research on reward ...