Disruptive and rude behavior by clinicians can hinder teamwork and diminish patient safety. In this simulation study, neonatal intensive care unit teams were randomized to exposure to rude comments versus neutral comments, with two additional teams randomized to exposure to rudeness with either a cognitive bias mitigation intervention or a narrative intervention. Rudeness was associated with worse performance, but training health care professionals to avoid cognitive distraction ameliorated the negative effect of rudeness.