J. Bryan Sexton, PhD, MA, is Assistant Professor, Department of Anesthesiology and Critical Care Medicine, at the Johns Hopkins University School of Medicine. Trained as a social psychologist, he has become one of the world's foremost authorities on the role of culture in patient safety. He developed the widely used Safety Attitudes Questionnaire and is one of the lead investigators of the Michigan Keystone ICU project, which aims to change practice and culture in intensive care units (ICUs) throughout the state. His research examines the connections between attitudes, behaviors, and outcomes in high-risk team environments, particularly aviation and medicine. We asked him to speak with us about safety climate surveys and efforts to change safety culture.