Because the benefits of cancer screening and its usefulness for a wide group of patients are uncertain and may outweigh the potential benefits, doctors and patients need to engage in shared decision making (SDM). And while this sounds straightforward, it’s often challenging. We’ve both been involved in developing SDM tools to guide breast and prostate cancer screening, Gonzalo with a focus on Latino patients. Most SDM research is based on the idea that patients make individual decisions. So the focus has been on understanding how patients acquire and make sense of information that’s often packed with statistical, epidemiological, and probabilistic data. And we ask how well people comprehend it.