The hazard recognition performance (i.e., percentage of hazardsrecognized) of each worker for each case image was calculated usingEq. (3). As can be seen, HRtotal was defined to include all unique hazardsthat were pre-identified by the expert panel and the ones the workersidentified in the current study. This provision was made to capture thetheoretical possibility of the workers identifying any additional hazardsthat were not already pre-identified by the expert panel. However, theworkers in the current study did not identify any additional uniquehazards that were not already pre-identified by the expert panel. Inother words, the HRtotal was equivalent to the number of safety hazardsthat were already pre-identified by the expert panel in the previousstudy.After computing hazard recognition performance using Eq. (3), eachworker’s performance was calculated as the average performance acrossthe two case images as shown in Eq. (4). Finally, the crew-level performancewas calculated as the average performance across all workersin a crew as shown in Eq. (5). Therefore, similar to the safety climatescore, a unique hazard recognition score was calculated for each of the57 participating crew.