The most effective interventions, Davis found, were those that had some interactive component—role-play, discussion groups, case solving, hands-on training, and the like. Such activities actually did improve both the doctors’ performance and their patients’ outcomes, although the overall improvement was small. By contrast, the least effective activities were “didactic” interventions—that is, those educational activities that essentially consisted of doctors listening to a lecture—which, sadly enough, are by far the most common types of activities