Objective To understand how firefighters’ use of rules (i.e., standard operating procedures [SOPs]) and deliberative decision making (i.e., operational discretion [OD]) interacts with acute stress. Background Current operational guidance for UK firefighters combines the provision of SOPs, for routine incidents, with the use of OD, under prescribed conditions (e.g., when there is a risk to human life). However, our understanding of the use of SOPs and OD is limited. Methods Incident commanders (ICs; n = 43) responded to simulated emergency incidents, which either licensed the use of OD or required use of a SOP. Video footage of IC behavior was used to code their response as involving a SOP or OD, while levels of acute stress were assessed using a blood-based measure and self-report. Results ICs were less likely to use OD selectively in the simulated emergency incident that licensed its use than in the one for which use of an SOP was appropriate; IC command level did not affect this pattern of results; and the incident that licensed OD resulted in more acute stress than the incident that required use of a SOP. Conclusion SOPs and OD were not used in the manner prescribed by current operational guidance in simulated emergency incidents. Application These results suggest that firefighter training in SOPs and OD should be augmented alongside personal resilience training, given the impact of stress on health and wellbeing, but also to improve the deployment of SOPs and OD under stress.

The Significance of this Class of Injury THE vast and far‐reaching effect of an eye injury is seldom fully realized, either by the worker or by the management, a fact which, no doubt, explains much of the prevalent disregard of preventive measures. A worker who sustains an eye accident, and goes off duty, disappears for a varying period of time from the ken of his shop manager and workmates in much the same way as one who has sustained a simple laceration of the hand or arm, yet to the medical and compensation departments his case may present far greater problems.