This study, published in Pediatrics, sought to examine the impact of rudeness on the performance of medical teams. Twenty-four NICU teams participated in a training simulation and were randomly assigned to either exposure to rudeness (in which the expert’s comments included mildly rude statements completely unrelated to the teams’ performance) or control (neutral comments). The videotaped simulation sessions were evaluated by 3 independent judges who used structured questionnaires to assess team performance, information-sharing, and help-seeking. The study found that rudeness had adverse consequences on the diagnostic and procedural performance of the NICU team members. Information-sharing mediated the adverse effect of rudeness on diagnostic performance, and help-seeking mediated the effect of rudeness on procedural performance.