Given the results of previous studies, we expected to find small to medium effect sizes between safety culture and safety performance, with correlation coefficients of .20 to .30. We also expected the safety culture survey to be negatively related to the NRC and INPO performance measures, such that higher scores on the safety culture survey are associated with lower values on the NRC and INPO safety performance measures (e.g., fewer scrams, inspection findings, and allegations). The following specific hypotheses are proposed.